new tcmod: "tcmod page <width> <height> <time>", as poor man's animmap alternative...

[xonotic/darkplaces.git] / gl_rmain.c

diff --git a/gl_rmain.c b/gl_rmain.c
index b7f72257764cda09fae723f2f4512252a00d875d..912b1f28c6196b707e0a1cf71212c6436b5f5535 100644 (file)
--- a/gl_rmain.c
+++ b/gl_rmain.c
@@ -4480,6 +4480,7 @@ static float R_EvaluateQ3WaveFunc(q3wavefunc_t func, const float *parms)
 
 void R_UpdateTextureInfo(const entity_render_t *ent, texture_t *t)
 {
+       int w, h, idx;
        int i;
        dp_model_t *model = ent->model;
        float f;
@@ -4608,6 +4609,14 @@ void R_UpdateTextureInfo(const entity_render_t *ent, texture_t *t)
                case Q3TCMOD_SCROLL:
                        Matrix4x4_CreateTranslate(&matrix, tcmod->parms[0] * r_refdef.scene.time, tcmod->parms[1] * r_refdef.scene.time, 0);
                        break;
+               case Q3TCMOD_PAGE: // poor man's animmap (to store animations into a single file, useful for HTTP downloaded textures)
+                       w = tcmod->parms[0];
+                       h = tcmod->parms[1];
+                       f = r_refdef.scene.time / (tcmod->parms[2] * w * h);
+                       f = f - floor(f);
+                       idx = floor(f * w * h);
+                       Matrix4x4_CreateTranslate(&matrix, (idx % w) / tcmod->parms[0], (idx / w) / tcmod->parms[1], 0);
+                       break;
                case Q3TCMOD_STRETCH:
                        f = 1.0f / R_EvaluateQ3WaveFunc(tcmod->wavefunc, tcmod->waveparms);
                        Matrix4x4_CreateFromQuakeEntity(&matrix, 0.5f * (1 - f), 0.5 * (1 - f), 0, 0, 0, 0, f);