X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=dosdemo;a=blobdiff_plain;f=src%2Fpolytest.c;h=2558389b2915e5b24604dfdb29d6ce81d474f057;hp=85b31282382b0d7bdfa0e51682fe021b469b741b;hb=a5c65ceb155188c8acee31a475f8db9f5b58f4b6;hpb=a1ede8e271fee1b4d029752603096db2be780e67

diff --git a/src/polytest.c b/src/polytest.c
index 85b3128..2558389 100644
--- a/src/polytest.c
+++ b/src/polytest.c
@@ -9,6 +9,7 @@
 #include "polyfill.h"	/* just for struct pimage */
 #include "cfgopt.h"
 #include "mesh.h"
+#include "bsptree.h"
 
 static int init(void);
 static void destroy(void);
@@ -28,9 +29,12 @@ static struct screen scr = {
 static float cam_theta, cam_phi = 25;
 static float cam_dist = 3;
 static struct g3d_mesh cube, torus;
+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;
@@ -52,6 +56,12 @@ static int init(void)
 		torus.varr[i].v *= 2.0;
 	}
 
+	init_bsp(&torus_bsp);
+	if(bsp_add_mesh(&torus_bsp, &torus) == -1) {
+		fprintf(stderr, "failed to construct torus BSP tree\n");
+		return -1;
+	}
+
 	gen_texture(&tex, 128, 128);
 
 #ifdef DEBUG_POLYFILL
@@ -70,6 +80,7 @@ static void destroy(void)
 	free(cube.varr);
 	free(torus.varr);
 	free(torus.iarr);
+	destroy_bsp(&torus_bsp);
 }
 
 static void start(long trans_time)
@@ -93,6 +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);
@@ -109,12 +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);
+	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);