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Add config var to toggle between incorrect/correct normal generation for GeoMipTerrain

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rdb 2015-10-23 16:18:59 +02:00
parent 83d9c4f528
commit da1d5755f9
1 changed files with 17 additions and 5 deletions
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22
panda/src/grutil/geoMipTerrain.cxx
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@ -30,6 +30,14 @@
#include "collideMask.h"
static ConfigVariableBool geomipterrain_incorrect_normals
("geomipterrain-incorrect-normals", true,
PRC_DESC("If true, uses the incorrect normal vector calculation that "
"was used in Panda3D versions 1.9.0 and earlier. If false, "
"uses the correct calculation. For backward compatibility, "
"the default value is true in 1.9 releases, and false in "
"Panda3D 1.10.0 and above."));
TypeHandle GeoMipTerrain::_type_handle;
////////////////////////////////////////////////////////////////////
@ -123,12 +131,12 @@ generate_block(unsigned short mx,
LVecBase4f color = _color_map.get_xel_a(
int((mx * _block_size + x) * cmap_xratio),
int((my * _block_size + y) * cmap_yratio));
cwriter.add_data4f(color);
cwriter.set_data4f(color);
}
vwriter.add_data3(x - 0.5 * _block_size, y - 0.5 * _block_size, get_pixel_value(mx, my, x, y));
twriter.add_data2((mx * _block_size + x) * tc_xscale,
vwriter.set_data3(x - 0.5 * _block_size, y - 0.5 * _block_size, get_pixel_value(mx, my, x, y));
twriter.set_data2((mx * _block_size + x) * tc_xscale,
(my * _block_size + y) * tc_yscale);
nwriter.add_data3(get_normal(mx, my, x, y));
nwriter.set_data3(get_normal(mx, my, x, y));
if (x > 0 && y > 0) {
// Left border
@ -328,11 +336,15 @@ get_normal(int x, int y) {
if (ny < 0) ny++;
if (px >= int(_xsize)) px--;
if (py >= int(_ysize)) py--;
double drx = get_pixel_value(px, y) - get_pixel_value(nx, y);
double drx = get_pixel_value(nx, y) - get_pixel_value(px, y);
double dry = get_pixel_value(x, py) - get_pixel_value(x, ny);
LVector3 normal(drx * 0.5, dry * 0.5, 1);
normal.normalize();
if (geomipterrain_incorrect_normals) {
normal[0] = -normal[0];
}
return normal;
}