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respect maya's convention of separate textures for color and transparency

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This commit is contained in:
David Rose 2003-04-14 17:06:45 +00:00
parent 0387fd286f
commit 064955a02b
9 changed files with 794 additions and 464 deletions
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1
pandatool/src/maya/Sources.pp
View File

@ -14,6 +14,7 @@
config_maya.cxx config_maya.h \
mayaApi.cxx mayaApi.h \
mayaShader.cxx mayaShader.h \
mayaShaderColorDef.cxx mayaShaderColorDef.h \
mayaShaders.cxx mayaShaders.h \
maya_funcs.I maya_funcs.cxx maya_funcs.h \
post_maya_include.h pre_maya_include.h

433
pandatool/src/maya/mayaShader.cxx
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@ -20,6 +20,7 @@
#include "maya_funcs.h"
#include "config_maya.h"
#include "string_utils.h"
#include "pnmImageHeader.h" // for lumin_red, etc.
#include "pset.h"
#include "pre_maya_include.h"
@ -40,35 +41,13 @@
////////////////////////////////////////////////////////////////////
MayaShader::
MayaShader(MObject engine) {
_has_color = false;
_transparency = 0.0;
_has_texture = false;
_projection_type = PT_off;
_map_uvs = NULL;
_coverage.set(1.0, 1.0);
_translate_frame.set(0.0, 0.0);
_rotate_frame = 0.0;
_mirror = false;
_stagger = false;
_wrap_u = true;
_wrap_v = true;
_repeat_uv.set(1.0, 1.0);
_offset.set(0.0, 0.0);
_rotate_uv = 0.0;
_color_object = (MObject *)NULL;
MFnDependencyNode engine_fn(engine);
_name = engine_fn.name().asChar();
set_name(engine_fn.name().asChar());
if (maya_cat.is_debug()) {
maya_cat.debug()
<< "Reading shading engine " << _name << "\n";
<< "Reading shading engine " << get_name() << "\n";
}
bool found_shader = false;
@ -91,56 +70,6 @@ MayaShader(MObject engine) {
////////////////////////////////////////////////////////////////////
MayaShader::
~MayaShader() {
if (_color_object != (MObject *)NULL) {
delete _color_object;
}
}
////////////////////////////////////////////////////////////////////
// Function: MayaShader::compute_texture_matrix
// Access: Public
// Description: Returns a texture matrix corresponding to the texture
// transforms indicated by the shader.
////////////////////////////////////////////////////////////////////
LMatrix3d MayaShader::
compute_texture_matrix() const {
LVector2d scale(_repeat_uv[0] / _coverage[0],
_repeat_uv[1] / _coverage[1]);
LVector2d trans(_offset[0] - _translate_frame[0] / _coverage[0],
_offset[1] - _translate_frame[1] / _coverage[1]);
return
(LMatrix3d::translate_mat(LVector2d(-0.5, -0.5)) *
LMatrix3d::rotate_mat(_rotate_frame) *
LMatrix3d::translate_mat(LVector2d(0.5, 0.5))) *
LMatrix3d::scale_mat(scale) *
LMatrix3d::translate_mat(trans);
}
////////////////////////////////////////////////////////////////////
// Function: MayaShader::has_projection
// Access: Public
// Description: Returns true if the shader has a projection in effect.
////////////////////////////////////////////////////////////////////
bool MayaShader::
has_projection() const {
return (_projection_type != PT_off);
}
////////////////////////////////////////////////////////////////////
// Function: MayaShader::project_uv
// Access: Public
// Description: If the shader has a projection (has_projection()
// returns true), this computes the appropriate UV
// corresponding to the indicated 3-d point. Seams that
// might be introduced on polygons that cross quadrants
// are closed up by ensuring the point is in the same
// quadrant as the indicated reference point.
////////////////////////////////////////////////////////////////////
TexCoordd MayaShader::
project_uv(const LPoint3d &pos, const LPoint3d &centroid) const {
nassertr(_map_uvs != NULL, TexCoordd::zero());
return (this->*_map_uvs)(pos * _projection_matrix, centroid * _projection_matrix);
}
////////////////////////////////////////////////////////////////////
@ -150,49 +79,58 @@ project_uv(const LPoint3d &pos, const LPoint3d &centroid) const {
////////////////////////////////////////////////////////////////////
void MayaShader::
output(ostream &out) const {
out << "Shader " << _name << ":\n";
if (_has_texture) {
out << " texture is " << _texture << "\n"
<< " coverage is " << _coverage << "\n"
<< " translate_frame is " << _translate_frame << "\n"
<< " rotate_frame is " << _rotate_frame << "\n"
<< " mirror is " << _mirror << "\n"
<< " stagger is " << _stagger << "\n"
<< " wrap_u is " << _wrap_u << "\n"
<< " wrap_v is " << _wrap_v << "\n"
<< " repeat_uv is " << _repeat_uv << "\n"
<< " offset is " << _offset << "\n"
<< " rotate_uv is " << _rotate_uv << "\n";
} else if (_has_color) {
out << " color is " << _color << "\n";
}
out << "Shader " << get_name();
}
////////////////////////////////////////////////////////////////////
// Function: MayaShader::reset_maya_texture
// Function: MayaShader::write
// Access: Public
// Description: Changes the texture filename stored in the Maya file
// for this particular shader.
// Description:
////////////////////////////////////////////////////////////////////
bool MayaShader::
reset_maya_texture(const Filename &texture) {
if (_color_object != (MObject *)NULL) {
_has_texture = set_string_attribute(*_color_object, "fileTextureName",
texture);
_texture = texture;
void MayaShader::
write(ostream &out) const {
out << "Shader " << get_name() << "\n"
<< " color:\n";
_color.write(out);
out << " transparency:\n";
_transparency.write(out);
}
if (!_has_texture) {
maya_cat.error()
<< "Unable to reset texture filename.\n";
}
////////////////////////////////////////////////////////////////////
// Function: MayaShader::get_rgba
// Access: Public
// Description: Returns the overall color of the shader as a
// single-precision rgba value, where the alpha
// component represents transparency according to the
// Panda convention. If no overall color is specified
// (_has_flat_color is not true), this returns white.
//
// Normally, Maya makes texture color override the flat
// color, so if a texture is also applied (_has_texture
// is true), this value is not used by Maya.
////////////////////////////////////////////////////////////////////
Colorf MayaShader::
get_rgba() const {
Colorf rgba(1.0f, 1.0f, 1.0f, 1.0f);
return _has_texture;
if (_color._has_flat_color) {
rgba[0] = (float)_color._flat_color[0];
rgba[1] = (float)_color._flat_color[1];
rgba[2] = (float)_color._flat_color[2];
}
maya_cat.error()
<< "Attempt to reset texture on Maya object that has no color set.\n";
return false;
if (_transparency._has_flat_color) {
// Maya supports colored transparency, but we only support
// grayscale transparency. Use the pnmimage constants to
// convert color to grayscale.
double trans =
_transparency._flat_color[0] * lumin_red +
_transparency._flat_color[1] * lumin_grn +
_transparency._flat_color[2] * lumin_blu;
rgba[3] = 1.0f - (float)trans;
}
return rgba;
}
////////////////////////////////////////////////////////////////////
@ -216,25 +154,34 @@ read_surface_shader(MObject shader) {
// shader says for color.
MPlug color_plug = shader_fn.findPlug("color");
if (color_plug.isNull()) {
// Or maybe a connection to outColor. Not sure how this differs
// from just color, but empirically it seems that either might be
// used.
color_plug = shader_fn.findPlug("outColor");
}
if (!color_plug.isNull()) {
MPlugArray color_pa;
color_plug.connectedTo(color_pa, true, false);
for (size_t i = 0; i < color_pa.length(); i++) {
read_surface_color(color_pa[0].node());
_color.read_surface_color(color_pa[0].node());
}
}
// Or maybe a connection to outColor. Not sure how this differs
// from just color, but empirically it seems that either might be
// used.
MPlug out_color_plug = shader_fn.findPlug("outColor");
if (!out_color_plug.isNull()) {
MPlugArray color_pa;
out_color_plug.connectedTo(color_pa, true, false);
// Transparency is stored separately.
MPlug trans_plug = shader_fn.findPlug("transparency");
if (trans_plug.isNull()) {
trans_plug = shader_fn.findPlug("outTransparency");
}
if (!trans_plug.isNull()) {
MPlugArray trans_pa;
trans_plug.connectedTo(trans_pa, true, false);
for (size_t i = 0; i < color_pa.length(); i++) {
read_surface_color(color_pa[0].node());
for (size_t i = 0; i < trans_pa.length(); i++) {
_transparency.read_surface_color(trans_pa[0].node());
}
}
@ -244,12 +191,22 @@ read_surface_shader(MObject shader) {
MFnLambertShader lambert_fn(shader);
MColor color = lambert_fn.color(&status);
if (status) {
_color.set(color.r, color.g, color.b, color.a);
_has_color = true;
// Warning! The alpha component of color doesn't mean
// transparency in Maya.
_color._has_flat_color = true;
_color._flat_color.set(color.r, color.g, color.b, color.a);
_transparency._flat_color.set(0.0, 0.0, 0.0, 0.0);
// Get the transparency separately.
color = lambert_fn.transparency(&status);
if (status) {
_transparency._has_flat_color = true;
_transparency._flat_color.set(color.r, color.g, color.b, color.a);
}
}
}
if (!_has_color && !_has_texture) {
if (!_color._has_flat_color && !_color._has_texture) {
if (maya_cat.is_spam()) {
maya_cat.spam()
<< " Color definition not found.\n";
@ -257,237 +214,3 @@ read_surface_shader(MObject shader) {
}
return true;
}
////////////////////////////////////////////////////////////////////
// Function: MayaShader::read_surface_color
// Access: Private
// Description: Determines the surface color specified by the shader.
// This includes texturing and other advanced shader
// properties.
////////////////////////////////////////////////////////////////////
void MayaShader::
read_surface_color(MObject color) {
if (color.hasFn(MFn::kFileTexture)) {
_color_object = new MObject(color);
string filename;
_has_texture = get_string_attribute(color, "fileTextureName", filename);
if (_has_texture) {
_texture = Filename::from_os_specific(filename);
}
get_vec2f_attribute(color, "coverage", _coverage);
get_vec2f_attribute(color, "translateFrame", _translate_frame);
get_angle_attribute(color, "rotateFrame", _rotate_frame);
get_bool_attribute(color, "mirror", _mirror);
get_bool_attribute(color, "stagger", _stagger);
get_bool_attribute(color, "wrapU", _wrap_u);
get_bool_attribute(color, "wrapV", _wrap_v);
get_vec2f_attribute(color, "repeatUV", _repeat_uv);
get_vec2f_attribute(color, "offset", _offset);
get_angle_attribute(color, "rotateUV", _rotate_uv);
} else if (color.hasFn(MFn::kProjection)) {
// This is a projected texture. We will have to step one level
// deeper to find the actual texture.
MFnDependencyNode projection_fn(color);
MPlug image_plug = projection_fn.findPlug("image");
if (!image_plug.isNull()) {
MPlugArray image_pa;
image_plug.connectedTo(image_pa, true, false);
for (size_t i = 0; i < image_pa.length(); i++) {
read_surface_color(image_pa[0].node());
}
}
if (!get_mat4d_attribute(color, "placementMatrix", _projection_matrix)) {
_projection_matrix = LMatrix4d::ident_mat();
}
// The uAngle and vAngle might be used for certain kinds of
// projections.
if (!get_angle_attribute(color, "uAngle", _u_angle)) {
_u_angle = 360.0;
}
if (!get_angle_attribute(color, "vAngle", _v_angle)) {
_v_angle = 180.0;
}
string type;
if (get_enum_attribute(color, "projType", type)) {
set_projection_type(type);
}
} else {
// This shader wasn't understood.
if (maya_cat.is_debug()) {
maya_cat.info()
<< "**Don't know how to interpret color attribute type "
<< color.apiTypeStr() << "\n";
} else {
// If we don't have a heavy verbose count, only report each type
// of unsupportted shader once.
static pset<MFn::Type> bad_types;
if (bad_types.insert(color.apiType()).second) {
maya_cat.info()
<< "**Don't know how to interpret color attribute type "
<< color.apiTypeStr() << "\n";
}
}
}
}
////////////////////////////////////////////////////////////////////
// Function: MayaShader::set_projection_type
// Access: Private
// Description: Sets up the shader to apply UV's according to the
// indicated projection type.
////////////////////////////////////////////////////////////////////
void MayaShader::
set_projection_type(const string &type) {
if (cmp_nocase(type, "planar") == 0) {
_projection_type = PT_planar;
_map_uvs = &MayaShader::map_planar;
// The Planar projection normally projects to a range (-1, 1) in
// both axes. Scale this into our UV range of (0, 1).
_projection_matrix = _projection_matrix * LMatrix4d(0.5, 0.0, 0.0, 0.0,
0.0, 0.5, 0.0, 0.0,
0.0, 0.0, 1.0, 0.0,
0.5, 0.5, 0.0, 1.0);
} else if (cmp_nocase(type, "cylindrical") == 0) {
_projection_type = PT_cylindrical;
_map_uvs = &MayaShader::map_cylindrical;
// The cylindrical projection is orthographic in the Y axis; scale
// the range (-1, 1) in this axis into our UV range (0, 1).
_projection_matrix = _projection_matrix * LMatrix4d(1.0, 0.0, 0.0, 0.0,
0.0, 0.5, 0.0, 0.0,
0.0, 0.0, 1.0, 0.0,
0.0, 0.5, 0.0, 1.0);
} else if (cmp_nocase(type, "spherical") == 0) {
_projection_type = PT_spherical;
_map_uvs = &MayaShader::map_spherical;
} else {
// Other projection types are currently unimplemented by the
// converter.
maya_cat.error()
<< "Don't know how to handle type " << type << " projections.\n";
_projection_type = PT_off;
_map_uvs = NULL;
}
}
////////////////////////////////////////////////////////////////////
// Function: MayaShader::map_planar
// Access: Private
// Description: Computes a UV based on the given point in space,
// using a planar projection.
////////////////////////////////////////////////////////////////////
LPoint2d MayaShader::
map_planar(const LPoint3d &pos, const LPoint3d &) const {
// A planar projection is about as easy as can be. We ignore the Z
// axis, and project the point into the XY plane. Done.
return LPoint2d(pos[0], pos[1]);
}
////////////////////////////////////////////////////////////////////
// Function: MayaShader::map_spherical
// Access: Private
// Description: Computes a UV based on the given point in space,
// using a spherical projection.
////////////////////////////////////////////////////////////////////
LPoint2d MayaShader::
map_spherical(const LPoint3d &pos, const LPoint3d &centroid) const {
// To compute the x position on the frame, we only need to consider
// the angle of the vector about the Y axis. Project the vector
// into the XZ plane to do this.
LVector2d xz(pos[0], pos[2]);
double xz_length = xz.length();
if (xz_length < 0.01) {
// If we have a point on or near either pole, we've got problems.
// This point maps to the entire bottom edge of the image, so
// which U value should we choose? It does make a difference,
// especially if we have a number of polygons around the south
// pole that all share the common vertex.
// We choose the U value based on the polygon's centroid.
xz.set(centroid[0], centroid[2]);
}
// Now, if the polygon crosses the seam, we also have problems.
// Make sure that the u value is in the same half of the texture as
// the centroid's u value.
double u = rad_2_deg(atan2(xz[0], xz[1])) / (2.0 * _u_angle);
double c = rad_2_deg(atan2(centroid[0], centroid[2])) / (2.0 * _u_angle);
if (u - c > 0.5) {
u -= floor(u - c + 0.5);
} else if (u - c < -0.5) {
u += floor(c - u + 0.5);
}
// Now rotate the vector into the YZ plane, and the V value is based
// on the latitude: the angle about the X axis.
LVector2d yz(pos[1], xz_length);
double v = rad_2_deg(atan2(yz[0], yz[1])) / (2.0 * _v_angle);
LPoint2d uv(u - 0.5, v - 0.5);
nassertr(fabs(u - c) <= 0.5, uv);
return uv;
}
////////////////////////////////////////////////////////////////////
// Function: MayaShader::map_cylindrical
// Access: Private
// Description: Computes a UV based on the given point in space,
// using a cylindrical projection.
////////////////////////////////////////////////////////////////////
LPoint2d MayaShader::
map_cylindrical(const LPoint3d &pos, const LPoint3d &centroid) const {
// This is almost identical to the spherical projection, except for
// the computation of V.
LVector2d xz(pos[0], pos[2]);
double xz_length = xz.length();
if (xz_length < 0.01) {
// A cylindrical mapping has the same singularity problem at the
// pole as a spherical mapping does: points at the pole do not map
// to a single point on the texture. (It's technically a slightly
// different problem: in a cylindrical mapping, points at the pole
// do not map to any point on the texture, while in a spherical
// mapping, points at the pole map to the top or bottom edge of
// the texture. But this is a technicality that doesn't really
// apply to us.) We still solve it the same way: if our point is
// at or near the pole, compute the angle based on the centroid of
// the polygon (which we assume is further from the pole).
xz.set(centroid[0], centroid[2]);
}
// And cylinders do still have a seam at the back.
double u = rad_2_deg(atan2(xz[0], xz[1])) / _u_angle;
double c = rad_2_deg(atan2(centroid[0], centroid[2])) / _u_angle;
if (u - c > 0.5) {
u -= floor(u - c + 0.5);
} else if (u - c < -0.5) {
u += floor(c - u + 0.5);
}
// For a cylindrical mapping, the V value comes directly from Y.
// Easy.
LPoint2d uv(u - 0.5, pos[1]);
nassertr(fabs(u - c) <= 0.5, uv);
return uv;
}

60
pandatool/src/maya/mayaShader.h
View File

@ -20,9 +20,11 @@
#define MAYASHADER_H
#include "pandatoolbase.h"
#include "mayaShaderColorDef.h"
#include "luse.h"
#include "lmatrix.h"
#include "namable.h"
class MObject;
@ -34,69 +36,21 @@ class MObject;
// that we don't care about or don't know enough to
// extract.
////////////////////////////////////////////////////////////////////
class MayaShader {
class MayaShader : public Namable {
public:
MayaShader(MObject engine);
~MayaShader();
LMatrix3d compute_texture_matrix() const;
bool has_projection() const;
TexCoordd project_uv(const LPoint3d &pos, const LPoint3d &ref_point) const;
void output(ostream &out) const;
bool reset_maya_texture(const Filename &texture);
void write(ostream &out) const;
string _name;
Colorf get_rgba() const;
bool _has_color;
Colord _color;
double _transparency;
bool _has_texture;
Filename _texture;
enum ProjectionType {
PT_off,
PT_planar,
PT_spherical,
PT_cylindrical,
PT_ball,
PT_cubic,
PT_triplanar,
PT_concentric,
PT_perspective,
};
ProjectionType _projection_type;
LMatrix4d _projection_matrix;
double _u_angle;
double _v_angle;
LVector2f _coverage;
LVector2f _translate_frame;
double _rotate_frame;
bool _mirror;
bool _stagger;
bool _wrap_u;
bool _wrap_v;
LVector2f _repeat_uv;
LVector2f _offset;
double _rotate_uv;
MayaShaderColorDef _color;
MayaShaderColorDef _transparency;
private:
MObject *_color_object;
bool read_surface_shader(MObject shader);
void read_surface_color(MObject color);
void set_projection_type(const string &type);
LPoint2d map_planar(const LPoint3d &pos, const LPoint3d &centroid) const;
LPoint2d map_spherical(const LPoint3d &pos, const LPoint3d &centroid) const;
LPoint2d map_cylindrical(const LPoint3d &pos, const LPoint3d &centroid) const;
// Define a pointer to one of the above member functions.
LPoint2d (MayaShader::*_map_uvs)(const LPoint3d &pos, const LPoint3d &centroid) const;
};
INLINE ostream &operator << (ostream &out, const MayaShader &shader) {

405
pandatool/src/maya/mayaShaderColorDef.cxx Normal file
View File

@ -0,0 +1,405 @@
// Filename: mayaShaderColorDef.cxx
// Created by: drose (12Apr03)
//
////////////////////////////////////////////////////////////////////
//
// PANDA 3D SOFTWARE
// Copyright (c) 2001, Disney Enterprises, Inc. All rights reserved
//
// All use of this software is subject to the terms of the Panda 3d
// Software license. You should have received a copy of this license
// along with this source code; you will also find a current copy of
// the license at http://www.panda3d.org/license.txt .
//
// To contact the maintainers of this program write to
// panda3d@yahoogroups.com .
//
////////////////////////////////////////////////////////////////////
#include "mayaShaderColorDef.h"
#include "maya_funcs.h"
#include "config_maya.h"
#include "string_utils.h"
#include "pset.h"
#include "pre_maya_include.h"
#include <maya/MFnDependencyNode.h>
#include <maya/MPlug.h>
#include <maya/MPlugArray.h>
#include <maya/MObject.h>
#include <maya/MStatus.h>
#include "post_maya_include.h"
////////////////////////////////////////////////////////////////////
// Function: MayaShaderColorDef::Constructor
// Access: Public
// Description:
////////////////////////////////////////////////////////////////////
MayaShaderColorDef::
MayaShaderColorDef() {
_has_flat_color = false;
_flat_color.set(0.0, 0.0, 0.0, 0.0);
_has_texture = false;
_projection_type = PT_off;
_map_uvs = NULL;
_coverage.set(1.0, 1.0);
_translate_frame.set(0.0, 0.0);
_rotate_frame = 0.0;
_mirror = false;
_stagger = false;
_wrap_u = true;
_wrap_v = true;
_repeat_uv.set(1.0, 1.0);
_offset.set(0.0, 0.0);
_rotate_uv = 0.0;
_color_object = (MObject *)NULL;
}
////////////////////////////////////////////////////////////////////
// Function: MayaShaderColorDef::Destructor
// Access: Public
// Description:
////////////////////////////////////////////////////////////////////
MayaShaderColorDef::
~MayaShaderColorDef() {
if (_color_object != (MObject *)NULL) {
delete _color_object;
}
}
////////////////////////////////////////////////////////////////////
// Function: MayaShaderColorDef::compute_texture_matrix
// Access: Public
// Description: Returns a texture matrix corresponding to the texture
// transforms indicated by the shader.
////////////////////////////////////////////////////////////////////
LMatrix3d MayaShaderColorDef::
compute_texture_matrix() const {
LVector2d scale(_repeat_uv[0] / _coverage[0],
_repeat_uv[1] / _coverage[1]);
LVector2d trans(_offset[0] - _translate_frame[0] / _coverage[0],
_offset[1] - _translate_frame[1] / _coverage[1]);
return
(LMatrix3d::translate_mat(LVector2d(-0.5, -0.5)) *
LMatrix3d::rotate_mat(_rotate_frame) *
LMatrix3d::translate_mat(LVector2d(0.5, 0.5))) *
LMatrix3d::scale_mat(scale) *
LMatrix3d::translate_mat(trans);
}
////////////////////////////////////////////////////////////////////
// Function: MayaShaderColorDef::has_projection
// Access: Public
// Description: Returns true if the shader has a projection in effect.
////////////////////////////////////////////////////////////////////
bool MayaShaderColorDef::
has_projection() const {
return (_projection_type != PT_off);
}
////////////////////////////////////////////////////////////////////
// Function: MayaShaderColorDef::project_uv
// Access: Public
// Description: If the shader has a projection (has_projection()
// returns true), this computes the appropriate UV
// corresponding to the indicated 3-d point. Seams that
// might be introduced on polygons that cross quadrants
// are closed up by ensuring the point is in the same
// quadrant as the indicated reference point.
////////////////////////////////////////////////////////////////////
TexCoordd MayaShaderColorDef::
project_uv(const LPoint3d &pos, const LPoint3d &centroid) const {
nassertr(_map_uvs != NULL, TexCoordd::zero());
return (this->*_map_uvs)(pos * _projection_matrix, centroid * _projection_matrix);
}
////////////////////////////////////////////////////////////////////
// Function: MayaShaderColorDef::write
// Access: Public
// Description:
////////////////////////////////////////////////////////////////////
void MayaShaderColorDef::
write(ostream &out) const {
if (_has_texture) {
out << " texture is " << _texture << "\n"
<< " coverage is " << _coverage << "\n"
<< " translate_frame is " << _translate_frame << "\n"
<< " rotate_frame is " << _rotate_frame << "\n"
<< " mirror is " << _mirror << "\n"
<< " stagger is " << _stagger << "\n"
<< " wrap_u is " << _wrap_u << "\n"
<< " wrap_v is " << _wrap_v << "\n"
<< " repeat_uv is " << _repeat_uv << "\n"
<< " offset is " << _offset << "\n"
<< " rotate_uv is " << _rotate_uv << "\n";
} else if (_has_flat_color) {
out << " flat color is " << _flat_color << "\n";
}
}
////////////////////////////////////////////////////////////////////
// Function: MayaShaderColorDef::reset_maya_texture
// Access: Public
// Description: Changes the texture filename stored in the Maya file
// for this particular shader.
////////////////////////////////////////////////////////////////////
bool MayaShaderColorDef::
reset_maya_texture(const Filename &texture) {
if (_color_object != (MObject *)NULL) {
_has_texture = set_string_attribute(*_color_object, "fileTextureName",
texture);
_texture = texture;
if (!_has_texture) {
maya_cat.error()
<< "Unable to reset texture filename.\n";
}
return _has_texture;
}
maya_cat.error()
<< "Attempt to reset texture on Maya object that has no color set.\n";
return false;
}
////////////////////////////////////////////////////////////////////
// Function: MayaShaderColorDef::read_surface_color
// Access: Private
// Description: Determines the surface color specified by the shader.
// This includes texturing and other advanced shader
// properties.
////////////////////////////////////////////////////////////////////
void MayaShaderColorDef::
read_surface_color(MObject color) {
if (color.hasFn(MFn::kFileTexture)) {
_color_object = new MObject(color);
string filename;
_has_texture = get_string_attribute(color, "fileTextureName", filename);
if (_has_texture) {
_texture = Filename::from_os_specific(filename);
}
get_vec2f_attribute(color, "coverage", _coverage);
get_vec2f_attribute(color, "translateFrame", _translate_frame);
get_angle_attribute(color, "rotateFrame", _rotate_frame);
get_bool_attribute(color, "mirror", _mirror);
get_bool_attribute(color, "stagger", _stagger);
get_bool_attribute(color, "wrapU", _wrap_u);
get_bool_attribute(color, "wrapV", _wrap_v);
get_vec2f_attribute(color, "repeatUV", _repeat_uv);
get_vec2f_attribute(color, "offset", _offset);
get_angle_attribute(color, "rotateUV", _rotate_uv);
} else if (color.hasFn(MFn::kProjection)) {
// This is a projected texture. We will have to step one level
// deeper to find the actual texture.
MFnDependencyNode projection_fn(color);
MPlug image_plug = projection_fn.findPlug("image");
if (!image_plug.isNull()) {
MPlugArray image_pa;
image_plug.connectedTo(image_pa, true, false);
for (size_t i = 0; i < image_pa.length(); i++) {
read_surface_color(image_pa[0].node());
}
}
if (!get_mat4d_attribute(color, "placementMatrix", _projection_matrix)) {
_projection_matrix = LMatrix4d::ident_mat();
}
// The uAngle and vAngle might be used for certain kinds of
// projections.
if (!get_angle_attribute(color, "uAngle", _u_angle)) {
_u_angle = 360.0;
}
if (!get_angle_attribute(color, "vAngle", _v_angle)) {
_v_angle = 180.0;
}
string type;
if (get_enum_attribute(color, "projType", type)) {
set_projection_type(type);
}
} else {
// This shader wasn't understood.
if (maya_cat.is_debug()) {
maya_cat.info()
<< "**Don't know how to interpret color attribute type "
<< color.apiTypeStr() << "\n";
} else {
// If we don't have a heavy verbose count, only report each type
// of unsupported shader once.
static pset<MFn::Type> bad_types;
if (bad_types.insert(color.apiType()).second) {
maya_cat.info()
<< "**Don't know how to interpret color attribute type "
<< color.apiTypeStr() << "\n";
}
}
}
}
////////////////////////////////////////////////////////////////////
// Function: MayaShaderColorDef::set_projection_type
// Access: Private
// Description: Sets up the shader to apply UV's according to the
// indicated projection type.
////////////////////////////////////////////////////////////////////
void MayaShaderColorDef::
set_projection_type(const string &type) {
if (cmp_nocase(type, "planar") == 0) {
_projection_type = PT_planar;
_map_uvs = &MayaShaderColorDef::map_planar;
// The Planar projection normally projects to a range (-1, 1) in
// both axes. Scale this into our UV range of (0, 1).
_projection_matrix = _projection_matrix * LMatrix4d(0.5, 0.0, 0.0, 0.0,
0.0, 0.5, 0.0, 0.0,
0.0, 0.0, 1.0, 0.0,
0.5, 0.5, 0.0, 1.0);
} else if (cmp_nocase(type, "cylindrical") == 0) {
_projection_type = PT_cylindrical;
_map_uvs = &MayaShaderColorDef::map_cylindrical;
// The cylindrical projection is orthographic in the Y axis; scale
// the range (-1, 1) in this axis into our UV range (0, 1).
_projection_matrix = _projection_matrix * LMatrix4d(1.0, 0.0, 0.0, 0.0,
0.0, 0.5, 0.0, 0.0,
0.0, 0.0, 1.0, 0.0,
0.0, 0.5, 0.0, 1.0);
} else if (cmp_nocase(type, "spherical") == 0) {
_projection_type = PT_spherical;
_map_uvs = &MayaShaderColorDef::map_spherical;
} else {
// Other projection types are currently unimplemented by the
// converter.
maya_cat.error()
<< "Don't know how to handle type " << type << " projections.\n";
_projection_type = PT_off;
_map_uvs = NULL;
}
}
////////////////////////////////////////////////////////////////////
// Function: MayaShaderColorDef::map_planar
// Access: Private
// Description: Computes a UV based on the given point in space,
// using a planar projection.
////////////////////////////////////////////////////////////////////
LPoint2d MayaShaderColorDef::
map_planar(const LPoint3d &pos, const LPoint3d &) const {
// A planar projection is about as easy as can be. We ignore the Z
// axis, and project the point into the XY plane. Done.
return LPoint2d(pos[0], pos[1]);
}
////////////////////////////////////////////////////////////////////
// Function: MayaShaderColorDef::map_spherical
// Access: Private
// Description: Computes a UV based on the given point in space,
// using a spherical projection.
////////////////////////////////////////////////////////////////////
LPoint2d MayaShaderColorDef::
map_spherical(const LPoint3d &pos, const LPoint3d &centroid) const {
// To compute the x position on the frame, we only need to consider
// the angle of the vector about the Y axis. Project the vector
// into the XZ plane to do this.
LVector2d xz(pos[0], pos[2]);
double xz_length = xz.length();
if (xz_length < 0.01) {
// If we have a point on or near either pole, we've got problems.
// This point maps to the entire bottom edge of the image, so
// which U value should we choose? It does make a difference,
// especially if we have a number of polygons around the south
// pole that all share the common vertex.
// We choose the U value based on the polygon's centroid.
xz.set(centroid[0], centroid[2]);
}
// Now, if the polygon crosses the seam, we also have problems.
// Make sure that the u value is in the same half of the texture as
// the centroid's u value.
double u = rad_2_deg(atan2(xz[0], xz[1])) / (2.0 * _u_angle);
double c = rad_2_deg(atan2(centroid[0], centroid[2])) / (2.0 * _u_angle);
if (u - c > 0.5) {
u -= floor(u - c + 0.5);
} else if (u - c < -0.5) {
u += floor(c - u + 0.5);
}
// Now rotate the vector into the YZ plane, and the V value is based
// on the latitude: the angle about the X axis.
LVector2d yz(pos[1], xz_length);
double v = rad_2_deg(atan2(yz[0], yz[1])) / (2.0 * _v_angle);
LPoint2d uv(u - 0.5, v - 0.5);
nassertr(fabs(u - c) <= 0.5, uv);
return uv;
}
////////////////////////////////////////////////////////////////////
// Function: MayaShaderColorDef::map_cylindrical
// Access: Private
// Description: Computes a UV based on the given point in space,
// using a cylindrical projection.
////////////////////////////////////////////////////////////////////
LPoint2d MayaShaderColorDef::
map_cylindrical(const LPoint3d &pos, const LPoint3d &centroid) const {
// This is almost identical to the spherical projection, except for
// the computation of V.
LVector2d xz(pos[0], pos[2]);
double xz_length = xz.length();
if (xz_length < 0.01) {
// A cylindrical mapping has the same singularity problem at the
// pole as a spherical mapping does: points at the pole do not map
// to a single point on the texture. (It's technically a slightly
// different problem: in a cylindrical mapping, points at the pole
// do not map to any point on the texture, while in a spherical
// mapping, points at the pole map to the top or bottom edge of
// the texture. But this is a technicality that doesn't really
// apply to us.) We still solve it the same way: if our point is
// at or near the pole, compute the angle based on the centroid of
// the polygon (which we assume is further from the pole).
xz.set(centroid[0], centroid[2]);
}
// And cylinders do still have a seam at the back.
double u = rad_2_deg(atan2(xz[0], xz[1])) / _u_angle;
double c = rad_2_deg(atan2(centroid[0], centroid[2])) / _u_angle;
if (u - c > 0.5) {
u -= floor(u - c + 0.5);
} else if (u - c < -0.5) {
u += floor(c - u + 0.5);
}
// For a cylindrical mapping, the V value comes directly from Y.
// Easy.
LPoint2d uv(u - 0.5, pos[1]);
nassertr(fabs(u - c) <= 0.5, uv);
return uv;
}

100
pandatool/src/maya/mayaShaderColorDef.h Executable file
View File

@ -0,0 +1,100 @@
// Filename: mayaShaderColorDef.h
// Created by: drose (12Apr03)
//
////////////////////////////////////////////////////////////////////
//
// PANDA 3D SOFTWARE
// Copyright (c) 2001, Disney Enterprises, Inc. All rights reserved
//
// All use of this software is subject to the terms of the Panda 3d
// Software license. You should have received a copy of this license
// along with this source code; you will also find a current copy of
// the license at http://www.panda3d.org/license.txt .
//
// To contact the maintainers of this program write to
// panda3d@yahoogroups.com .
//
////////////////////////////////////////////////////////////////////
#ifndef MAYASHADERCOLORDEF_H
#define MAYASHADERCOLORDEF_H
#include "pandatoolbase.h"
#include "luse.h"
#include "lmatrix.h"
class MObject;
////////////////////////////////////////////////////////////////////
// Class : MayaShaderColorDef
// Description : This defines the various attributes that Maya may
// associate with the "color" channel for a particular
// shader (as well as on the "transparency" channel).
////////////////////////////////////////////////////////////////////
class MayaShaderColorDef {
public:
MayaShaderColorDef();
~MayaShaderColorDef();
LMatrix3d compute_texture_matrix() const;
bool has_projection() const;
TexCoordd project_uv(const LPoint3d &pos, const LPoint3d &ref_point) const;
bool reset_maya_texture(const Filename &texture);
void write(ostream &out) const;
enum ProjectionType {
PT_off,
PT_planar,
PT_spherical,
PT_cylindrical,
PT_ball,
PT_cubic,
PT_triplanar,
PT_concentric,
PT_perspective,
};
bool _has_texture;
Filename _texture;
bool _has_flat_color;
Colord _flat_color;
ProjectionType _projection_type;
LMatrix4d _projection_matrix;
double _u_angle;
double _v_angle;
LVector2f _coverage;
LVector2f _translate_frame;
double _rotate_frame;
bool _mirror;
bool _stagger;
bool _wrap_u;
bool _wrap_v;
LVector2f _repeat_uv;
LVector2f _offset;
double _rotate_uv;
private:
void read_surface_color(MObject color);
void set_projection_type(const string &type);
LPoint2d map_planar(const LPoint3d &pos, const LPoint3d &centroid) const;
LPoint2d map_spherical(const LPoint3d &pos, const LPoint3d &centroid) const;
LPoint2d map_cylindrical(const LPoint3d &pos, const LPoint3d &centroid) const;
// Define a pointer to one of the above member functions.
LPoint2d (MayaShaderColorDef::*_map_uvs)(const LPoint3d &pos, const LPoint3d &centroid) const;
MObject *_color_object;
friend class MayaShader;
};
#endif

181
pandatool/src/mayaegg/mayaToEggConverter.cxx
View File

@ -1388,11 +1388,13 @@ make_polyset(const MDagPath &dag_path, const MFnMesh &mesh,
shader = default_shader;
}
const MayaShaderColorDef &color_def = shader->_color;
// Since a texture completely replaces a polygon or vertex color,
// we need to know up front whether we have a texture.
bool has_texture = false;
if (shader != (MayaShader *)NULL) {
has_texture = shader->_has_texture;
has_texture = color_def._has_texture;
}
// Get the vertices for the polygon.
@ -1400,7 +1402,7 @@ make_polyset(const MDagPath &dag_path, const MFnMesh &mesh,
long i;
LPoint3d centroid(0.0, 0.0, 0.0);
if (shader != (MayaShader *)NULL && shader->has_projection()) {
if (shader != (MayaShader *)NULL && color_def.has_projection()) {
// If the shader has a projection, we may need to compute the
// polygon's centroid to avoid seams at the edges.
for (i = 0; i < num_verts; i++) {
@ -1430,10 +1432,10 @@ make_polyset(const MDagPath &dag_path, const MFnMesh &mesh,
vert.set_normal(n3d);
}
if (shader != (MayaShader *)NULL && shader->has_projection()) {
if (shader != (MayaShader *)NULL && color_def.has_projection()) {
// If the shader has a projection, use it instead of the
// polygon's built-in UV's.
vert.set_uv(shader->project_uv(p3d, centroid));
vert.set_uv(color_def.project_uv(p3d, centroid));
} else if (pi.hasUVs()) {
// Get the UV's from the polygon.
@ -1778,7 +1780,7 @@ get_egg_table(const MDagPath &dag_path, EggGroupNode *egg_root) {
////////////////////////////////////////////////////////////////////
// Function: MayaShader::set_shader_attributes
// Access: Public
// Access: Private
// Description: Applies the known shader attributes to the indicated
// egg primitive.
////////////////////////////////////////////////////////////////////
@ -1786,40 +1788,162 @@ void MayaToEggConverter::
set_shader_attributes(EggPrimitive &primitive, const MayaShader &shader) {
// In Maya, a polygon is either textured or colored. The texture,
// if present, replaces the color.
const MayaShaderColorDef &color_def = shader._color;
const MayaShaderColorDef &trans_def = shader._transparency;
if (color_def._has_texture || trans_def._has_texture) {
EggTexture tex(shader.get_name(), "");
if (shader._has_texture) {
Filename filename = Filename::from_os_specific(shader._texture);
Filename fullpath =
_path_replace->match_path(filename, get_texture_path());
EggTexture tex(shader._name, _path_replace->store_path(fullpath));
tex.set_fullpath(fullpath);
if (color_def._has_texture) {
// If we have a texture on color, apply it as the filename.
Filename filename = Filename::from_os_specific(color_def._texture);
Filename fullpath =
_path_replace->match_path(filename, get_texture_path());
tex.set_filename(_path_replace->store_path(fullpath));
tex.set_fullpath(fullpath);
apply_texture_properties(tex, color_def);
tex.set_wrap_u(shader._wrap_u ? EggTexture::WM_repeat : EggTexture::WM_clamp);
tex.set_wrap_v(shader._wrap_v ? EggTexture::WM_repeat : EggTexture::WM_clamp);
// Let's mipmap all textures by default.
tex.set_minfilter(EggTexture::FT_linear_mipmap_linear);
tex.set_magfilter(EggTexture::FT_linear);
// If we also have a texture on transparency, apply it as the
// alpha filename.
if (trans_def._has_texture) {
if (color_def._wrap_u != trans_def._wrap_u ||
color_def._wrap_u != trans_def._wrap_u) {
mayaegg_cat.warning()
<< "Shader " << shader.get_name()
<< " has contradictory wrap modes on color and texture.\n";
}
filename = Filename::from_os_specific(trans_def._texture);
fullpath = _path_replace->match_path(filename, get_texture_path());
tex.set_alpha_filename(_path_replace->store_path(fullpath));
tex.set_alpha_fullpath(fullpath);
tex.set_format(EggTexture::F_rgba);
LMatrix3d mat = shader.compute_texture_matrix();
if (!mat.almost_equal(LMatrix3d::ident_mat())) {
tex.set_transform(mat);
if (!compare_texture_properties(tex, trans_def)) {
// Only report each broken shader once.
static pset<string> bad_shaders;
if (bad_shaders.insert(shader.get_name()).second) {
mayaegg_cat.error()
<< "Color and transparency texture properties differ on shader "
<< shader.get_name() << "\n";
}
}
} else {
// Otherwise, we don't have any transparency, so tell the egg
// format to ignore any alpha channel that might be on the
// color texture.
tex.set_format(EggTexture::F_rgb);
}
} else { // trans_def._has_texture
// We have a texture on transparency only. Apply it as the
// primary filename, and set the format accordingly.
Filename filename = Filename::from_os_specific(trans_def._texture);
Filename fullpath =
_path_replace->match_path(filename, get_texture_path());
tex.set_filename(_path_replace->store_path(fullpath));
tex.set_fullpath(fullpath);
tex.set_format(EggTexture::F_alpha);
apply_texture_properties(tex, trans_def);
}
EggTexture *new_tex =
_textures.create_unique_texture(tex, ~EggTexture::E_tref_name);
primitive.set_texture(new_tex);
} else if (shader._has_color) {
primitive.set_color(Colorf(shader._color[0], shader._color[1],
shader._color[2], 1.0f));
}
// Also apply an overall color to the primitive.
Colorf rgba = shader.get_rgba();
// This is a placeholder for a parameter on the shader or group that
// we have yet to define.
static const bool modulate = false;
if (!modulate) {
// If modulate is not specified, the existence of a texture on
// either color channel completely replaces the flat color.
if (color_def._has_texture) {
rgba[0] = 1.0f;
rgba[1] = 1.0f;
rgba[2] = 1.0f;
}
if (trans_def._has_texture) {
rgba[3] = 1.0f;
}
}
primitive.set_color(rgba);
}
////////////////////////////////////////////////////////////////////
// Function: MayaShader::apply_texture_properties
// Access: Private
// Description: Applies all the appropriate texture properties to the
// EggTexture object, including wrap modes and texture
// matrix.
////////////////////////////////////////////////////////////////////
void MayaToEggConverter::
apply_texture_properties(EggTexture &tex, const MayaShaderColorDef &color_def) {
// Let's mipmap all textures by default.
tex.set_minfilter(EggTexture::FT_linear_mipmap_linear);
tex.set_magfilter(EggTexture::FT_linear);
EggTexture::WrapMode wrap_u = color_def._wrap_u ? EggTexture::WM_repeat : EggTexture::WM_clamp;
EggTexture::WrapMode wrap_v = color_def._wrap_v ? EggTexture::WM_repeat : EggTexture::WM_clamp;
tex.set_wrap_u(wrap_u);
tex.set_wrap_v(wrap_v);
LMatrix3d mat = color_def.compute_texture_matrix();
if (!mat.almost_equal(LMatrix3d::ident_mat())) {
tex.set_transform(mat);
}
}
////////////////////////////////////////////////////////////////////
// Function: MayaShader::compare_texture_properties
// Access: Private
// Description: Compares the texture properties already on the
// texture (presumably set by a previous call to
// apply_texture_properties()) and returns false if they
// differ from that specified by the indicated color_def
// object, or true if they match.
////////////////////////////////////////////////////////////////////
bool MayaToEggConverter::
compare_texture_properties(EggTexture &tex,
const MayaShaderColorDef &color_def) {
bool okflag = true;
EggTexture::WrapMode wrap_u = color_def._wrap_u ? EggTexture::WM_repeat : EggTexture::WM_clamp;
EggTexture::WrapMode wrap_v = color_def._wrap_v ? EggTexture::WM_repeat : EggTexture::WM_clamp;
if (wrap_u != tex.determine_wrap_u()) {
// Choose the more general of the two.
if (wrap_u == EggTexture::WM_repeat) {
tex.set_wrap_u(wrap_u);
}
okflag = false;
}
if (wrap_v != tex.determine_wrap_v()) {
if (wrap_v == EggTexture::WM_repeat) {
tex.set_wrap_v(wrap_v);
}
okflag = false;
}
LMatrix3d mat = color_def.compute_texture_matrix();
if (!mat.almost_equal(tex.get_transform())) {
okflag = false;
}
return okflag;
}
////////////////////////////////////////////////////////////////////
// Function: MayaShader::reparent_decals
// Access: Public
// Access: Private
// Description: Recursively walks the egg hierarchy, reparenting
// "decal" type nodes below their corresponding
// "decalbase" type nodes, and setting the flags.
@ -1876,13 +2000,10 @@ reparent_decals(EggGroupNode *egg_parent) {
// All the decal children get moved to be a child of decal base.
// This usually will not affect the vertex positions, but it
// could if the decal base has a transform and the decal child
// is an instance node. So don't do that. Also, we assume it's
// undesired to have a transform on a decal, so we flatten those
// out here--there's no real requirement to do this, however.
// is an instance node. So don't do that.
pvector<EggGroup *>::iterator di;
for (di = decal_children.begin(); di != decal_children.end(); ++di) {
EggGroup *child_group = (*di);
child_group->flatten_transforms();
decal_base->add_child(child_group);
}

5
pandatool/src/mayaegg/mayaToEggConverter.h
View File

@ -39,6 +39,7 @@ class EggVertexPool;
class EggNurbsCurve;
class EggPrimitive;
class EggXfmSAnim;
class MayaShaderColorDef;
class MDagPath;
class MFnNurbsSurface;
@ -119,6 +120,10 @@ private:
JointAnim *get_egg_table(const string &name, EggGroupNode *egg_root);
void set_shader_attributes(EggPrimitive &primitive,
const MayaShader &shader);
void apply_texture_properties(EggTexture &tex,
const MayaShaderColorDef &color_def);
bool compare_texture_properties(EggTexture &tex,
const MayaShaderColorDef &color_def);
bool reparent_decals(EggGroupNode *egg_parent);

71
pandatool/src/mayaprogs/mayaCopy.cxx
View File

@ -167,32 +167,11 @@ copy_maya_file(const Filename &source, const Filename &dest,
int num_shaders = _shaders.get_num_shaders();
for (int i = 0; i < num_shaders; i++) {
MayaShader *shader = _shaders.get_shader(i);
if (shader->_has_texture) {
Filename texture_filename =
_path_replace->convert_path(shader->_texture);
if (!texture_filename.exists()) {
nout << "*** Warning: texture " << texture_filename
<< " does not exist.\n";
} else if (!texture_filename.is_regular_file()) {
nout << "*** Warning: texture " << texture_filename
<< " is not a regular file.\n";
} else {
ExtraData ed;
ed._type = FT_texture;
CVSSourceDirectory *texture_dir =
import(texture_filename, &ed, _map_dir);
if (texture_dir == (CVSSourceDirectory *)NULL) {
return false;
}
// Update the texture reference to point to the new texture
// filename, relative to the flt file. Not sure how to do
// this right now.
Filename new_filename = dir->get_rel_to(texture_dir) + "/" +
texture_filename.get_basename();
shader->reset_maya_texture(new_filename);
}
if (!extract_texture(shader->_color, dir)) {
return false;
}
if (!extract_texture(shader->_transparency, dir)) {
return false;
}
}
@ -236,6 +215,46 @@ copy_maya_file(const Filename &source, const Filename &dest,
return true;
}
////////////////////////////////////////////////////////////////////
// Function: MayaCopy::extract_texture
// Access: Private
// Description: Gets the texture out of the indicated color channel
// and copies it in, updating the channel with the new
// texture filename. Returns true on success, false on
// failure.
////////////////////////////////////////////////////////////////////
bool MayaCopy::
extract_texture(MayaShaderColorDef &color_def, CVSSourceDirectory *dir) {
if (color_def._has_texture) {
Filename texture_filename =
_path_replace->convert_path(color_def._texture);
if (!texture_filename.exists()) {
nout << "*** Warning: texture " << texture_filename
<< " does not exist.\n";
} else if (!texture_filename.is_regular_file()) {
nout << "*** Warning: texture " << texture_filename
<< " is not a regular file.\n";
} else {
ExtraData ed;
ed._type = FT_texture;
CVSSourceDirectory *texture_dir =
import(texture_filename, &ed, _map_dir);
if (texture_dir == (CVSSourceDirectory *)NULL) {
return false;
}
// Update the texture reference to point to the new texture
// filename, relative to the maya file.
Filename new_filename = dir->get_rel_to(texture_dir) + "/" +
texture_filename.get_basename();
color_def.reset_maya_texture(new_filename);
}
}
return true;
}
////////////////////////////////////////////////////////////////////
// Function: MayaCopy::copy_texture
// Access: Private

2
pandatool/src/mayaprogs/mayaCopy.h
View File

@ -29,6 +29,7 @@
#include "pset.h"
class MayaShader;
class MayaShaderColorDef;
class MDagPath;
////////////////////////////////////////////////////////////////////
@ -63,6 +64,7 @@ private:
bool copy_maya_file(const Filename &source, const Filename &dest,
CVSSourceDirectory *dir);
bool extract_texture(MayaShaderColorDef &color_def, CVSSourceDirectory *dir);
bool copy_texture(const Filename &source, const Filename &dest,
CVSSourceDirectory *dir);