TheCloud/panda3d
1
0
Fork 0
mirror of https://github.com/panda3d/panda3d.git synced 2025-10-03 10:22:45 -04:00
Code Issues Packages Projects Releases Wiki Activity

3-d texture coordinates, deal with animation properly

Browse Source
This commit is contained in:
David Rose 2005-08-16 20:27:51 +00:00
parent 62e0ca3d4f
commit f46eaaa3a8
1 changed files with 26 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

40
panda/src/distort/projectionScreen.cxx
View File

@ -505,20 +505,22 @@ recompute_geom_node(const WorkingNodePath &np, LMatrix4f &rel_mat,
//////////////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////////////
void ProjectionScreen:: void ProjectionScreen::
recompute_geom(Geom *geom, const LMatrix4f &rel_mat) { recompute_geom(Geom *geom, const LMatrix4f &rel_mat) {
static const LMatrix3f lens_to_uv static const LMatrix4f lens_to_uv
(0.5f, 0.0f, 0.0f, (0.5f, 0.0f, 0.0f, 0.0f,
0.0f, 0.5f, 0.0f, 0.0f, 0.5f, 0.0f, 0.0f,
0.5f, 0.5f, 1.0f); 0.0f, 0.0f, 0.5f, 0.0f,
0.5f, 0.5f, 0.5f, 1.0f);
static const LMatrix3f lens_to_uv_inverted static const LMatrix4f lens_to_uv_inverted
(0.5f, 0.0f, 0.0f, (0.5f, 0.0f, 0.0f, 0.0f,
0.0f,-0.5f, 0.0f, 0.0f,-0.5f, 0.0f, 0.0f,
0.5f, 0.5f, 1.0f); 0.0f, 0.0f, 0.5f, 0.0f,
0.5f, 0.5f, 0.5f, 1.0f);
Lens *lens = _projector_node->get_lens(); Lens *lens = _projector_node->get_lens();
nassertv(lens != (Lens *)NULL); nassertv(lens != (Lens *)NULL);
const LMatrix3f &to_uv = _invert_uvs ? lens_to_uv_inverted : lens_to_uv; const LMatrix4f &to_uv = _invert_uvs ? lens_to_uv_inverted : lens_to_uv;
// Iterate through all the vertices in the Geom. // Iterate through all the vertices in the Geom.
@ -526,7 +528,7 @@ recompute_geom(Geom *geom, const LMatrix4f &rel_mat) {
if (!vdata->has_column(_texcoord_name)) { if (!vdata->has_column(_texcoord_name)) {
// We need to add a new column for the new texcoords. // We need to add a new column for the new texcoords.
vdata = vdata->replace_column vdata = vdata->replace_column
(_texcoord_name, 2, Geom::NT_float32, Geom::C_texcoord); (_texcoord_name, 3, Geom::NT_float32, Geom::C_texcoord);
geom->set_vertex_data(vdata); geom->set_vertex_data(vdata);
} }
if (_vignette_on && !vdata->has_column(InternalName::get_color())) { if (_vignette_on && !vdata->has_column(InternalName::get_color())) {
@ -536,9 +538,17 @@ recompute_geom(Geom *geom, const LMatrix4f &rel_mat) {
geom->set_vertex_data(vdata); geom->set_vertex_data(vdata);
} }
GeomVertexWriter texcoord(geom->modify_vertex_data(), _texcoord_name); // Clear the vdata pointer so we don't force a copy in the below.
GeomVertexWriter color(geom->modify_vertex_data()); vdata.clear();
GeomVertexReader vertex(geom->get_vertex_data(), InternalName::get_vertex());
PT(GeomVertexData) modify_vdata = geom->modify_vertex_data();
// Maybe the vdata has animation that we should consider.
CPT(GeomVertexData) animated_vdata = geom->get_vertex_data()->animate_vertices();
GeomVertexWriter texcoord(modify_vdata, _texcoord_name);
GeomVertexWriter color(modify_vdata);
GeomVertexReader vertex(animated_vdata, InternalName::get_vertex());
if (_vignette_on) { if (_vignette_on) {
color.set_column(InternalName::get_color()); color.set_column(InternalName::get_color());
@ -548,12 +558,12 @@ recompute_geom(Geom *geom, const LMatrix4f &rel_mat) {
Vertexf vert = vertex.get_data3f(); Vertexf vert = vertex.get_data3f();
// For each vertex, project to the film plane. // For each vertex, project to the film plane.
LPoint2f film(0.0, 0.0); LPoint3f film(0.0f, 0.0f, 0.0f);
bool good = lens->project(vert * rel_mat, film); bool good = lens->project(vert * rel_mat, film);
// Now the lens gives us coordinates in the range [-1, 1]. // Now the lens gives us coordinates in the range [-1, 1].
// Rescale these to [0, 1]. // Rescale these to [0, 1].
texcoord.set_data2f(film * to_uv); texcoord.set_data3f(film * to_uv);
// If we have vignette color in effect, color the vertex according // If we have vignette color in effect, color the vertex according
// to whether it fell in front of the lens or not. // to whether it fell in front of the lens or not.