major bsp bugs fixed

[dosdemo] / src / polytest.c

diff --git a/src/polytest.c b/src/polytest.c
index 8d81262..2558389 100644 (file)
--- a/src/polytest.c
+++ b/src/polytest.c
@@ -33,6 +33,8 @@ static struct bsptree torus_bsp;
 
 static struct pimage tex;
 
+static int use_bsp = 1;
+
 #define LOWRES_SCALE   10
 static uint16_t *lowres_pixels;
 static int lowres_width, lowres_height;
@@ -102,6 +104,9 @@ static void update(void)
 
 static void draw(void)
 {
+       float vdir[3];
+       const float *mat;
+
        update();
 
        memset(fb_pixels, 0, fb_width * fb_height * 2);
@@ -118,13 +123,22 @@ static void draw(void)
 
        g3d_light_pos(0, -10, 10, 20);
 
-       zsort_mesh(&torus);
-
        g3d_mtl_diffuse(0.4, 0.7, 1.0);
        g3d_set_texture(tex.width, tex.height, tex.pixels);
 
-       draw_mesh(&torus);
-       /*draw_bsp(&torus_bsp);*/
+       if(use_bsp) {
+               /* calc world-space view direction */
+               mat = g3d_get_matrix(G3D_MODELVIEW, 0);
+               /* transform (0, 0, -1) with transpose(mat3x3) */
+               vdir[0] = -mat[2];
+               vdir[1] = -mat[6];
+               vdir[2] = -mat[10];
+
+               draw_bsp(&torus_bsp, vdir[0], vdir[1], vdir[2]);
+       } else {
+               zsort_mesh(&torus);
+               draw_mesh(&torus);
+       }
 
        /*draw_mesh(&cube);*/
        swap_buffers(fb_pixels);