X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=dosdemo;a=blobdiff_plain;f=src%2Fpolytest.c;h=afe20069968f53a34c0ab917d0c859a529d38dbb;hp=8d81262196a5cea3b542f4105b7cce3388282ea9;hb=77e0277af0c00dae78c7a739b2ca70cc19fd041a;hpb=32ff3cf2d7d7a5ae82f5ca400b320c67e6984ad6

diff --git a/src/polytest.c b/src/polytest.c
index 8d81262..afe2006 100644
--- a/src/polytest.c
+++ b/src/polytest.c
@@ -23,7 +23,8 @@ static struct screen scr = {
 	init,
 	destroy,
 	start, 0,
-	draw
+	draw,
+	0
 };
 
 static float cam_theta, cam_phi = 25;
@@ -33,6 +34,8 @@ 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 +105,9 @@ 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 +124,22 @@ 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);