now uploads a 3D attenuation texture (not used yet)

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@2499 d7cf8633-e32d-0410-b094-e92efae38249

diff --git a/r_shadow.c b/r_shadow.c
index c13a9779d631727405390ba6e0565fa8069fbb79..24a6427b6f807886e0e264e4f482e56eeed42d5b 100644 (file)
--- a/r_shadow.c
+++ b/r_shadow.c
@@ -9,6 +9,9 @@ int *shadowelements;
 int maxtrianglefacinglight;
 qbyte *trianglefacinglight;
 
+rtexturepool_t *r_shadow_texturepool;
+rtexture_t *r_shadow_attenuationtexture;
+
 void r_shadow_start(void)
 {
        // allocate vertex processing arrays
@@ -17,10 +20,14 @@ void r_shadow_start(void)
        shadowelements = NULL;
        maxtrianglefacinglight = 0;
        trianglefacinglight = NULL;
+       r_shadow_attenuationtexture = NULL;
+       r_shadow_texturepool = NULL;
 }
 
 void r_shadow_shutdown(void)
 {
+       r_shadow_attenuationtexture = NULL;
+       R_FreeTexturePool(&r_shadow_texturepool);
        maxshadowelements = 0;
        shadowelements = NULL;
        maxtrianglefacinglight = 0;
@@ -242,9 +249,37 @@ void R_Shadow_RenderVolume(int numverts, int numtris, int *elements, int visible
        }
 }
 
+static void R_Shadow_MakeTextures(void)
+{
+       int x, y, z, d;
+       float v[3];
+       qbyte data[32][32][32][4];
+       r_shadow_texturepool = R_AllocTexturePool();
+       for (z = 0;z < 32;z++)
+       {
+               v[2] = z - 16.0f;
+               for (y = 0;y < 32;y++)
+               {
+                       v[1] = y - 16.0f;
+                       for (x = 0;x < 32;x++)
+                       {
+                               v[0] = x - 16.0f;
+                               d = (int) ((1024.0f / (DotProduct(v, v)+1)) - 8.0f);
+                               d = bound(0, d, 255);
+                               data[z][y][x][0] = data[z][y][x][1] = data[z][y][x][2] = data[z][y][x][3] = d;
+                       }
+               }
+       }
+       r_shadow_attenuationtexture = R_LoadTexture3D(r_shadow_texturepool, "attenuation", 32, 32, 32, &data[0][0][0][0], TEXTYPE_RGBA, TEXF_PRECACHE | TEXF_ALPHA);
+}
+
 void R_Shadow_Stage_Depth(void)
 {
        rmeshstate_t m;
+
+       if (!r_shadow_attenuationtexture)
+               R_Shadow_MakeTextures();
+
        memset(&m, 0, sizeof(m));
        m.blendfunc1 = GL_ONE;
        m.blendfunc2 = GL_ZERO;
@@ -328,6 +363,7 @@ void R_Shadow_VertexLight(int numverts, float *vertex, float *normals, vec3_t re
        float *n, *v, *c, f, dist, temp[3], light[3];
        // calculate vertex colors
        VectorCopy(lightcolor, light);
+
        for (i = 0, v = vertex, c = varray_color, n = normals;i < numverts;i++, v += 4, c += 4, n += 3)
        {
                VectorSubtract(relativelightorigin, v, temp);