+ if (LinearFilter) {
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+ }
+ else {
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+ }
+ if (DisplayMode == SHOW_DEPTH_MAPPING) {
+#if defined(GL_ARB_shadow)
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_MODE_ARB, GL_NONE);
+#elif defined(GL_SGIX_shadow)
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_SGIX, GL_FALSE);
+#endif
+ glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
+ glEnable(GL_TEXTURE_2D);
+ MakeShadowMatrix(LightPos, SpotDir, SpotAngle, ShadowNear, ShadowFar);
+ EnableIdentityTexgen();
+ }
+ else if (DisplayMode == SHOW_DISTANCE) {
+ glMatrixMode(GL_TEXTURE);
+ glLoadIdentity();
+ glMatrixMode(GL_MODELVIEW);
+ EnableDistanceTexgen(LightPos, SpotDir, ShadowNear+Bias, ShadowFar);
+ glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
+ glEnable(GL_TEXTURE_1D);
+ }
+ else {
+ assert(DisplayMode == SHOW_NORMAL);
+#if defined(GL_ARB_shadow)
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_MODE_ARB,
+ GL_COMPARE_R_TO_TEXTURE_ARB);
+#elif defined(GL_SGIX_shadow)
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_SGIX, GL_TRUE);
+#endif
+ glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
+ glEnable(GL_TEXTURE_2D);
+ MakeShadowMatrix(LightPos, SpotDir, SpotAngle, ShadowNear, ShadowFar);
+ EnableIdentityTexgen();
+ }