debugging the BSP

[dosdemo] / src / polytest.c

diff --git a/src/polytest.c b/src/polytest.c
index 85b3128..dfca5ef 100644 (file)
--- 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);
@@ -28,6 +29,7 @@ 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;
 
@@ -52,6 +54,12 @@ 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 +78,7 @@ 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 +102,9 @@ static void update(void)
 
 static void draw(void)
 {
+       float vdir[3];
+       float mat[16];
+
        update();
 
        memset(fb_pixels, 0, fb_width * fb_height * 2);
@@ -107,6 +119,14 @@ static void draw(void)
                g3d_rotate(cam_theta, 0, 1, 0);
        }
 
+       /* calc world-space view direction */
+       g3d_get_matrix(G3D_MODELVIEW, mat);
+       /* transform (0, 0, -1) with transpose(mat3x3) */
+       vdir[0] = -mat[2];
+       vdir[1] = -mat[6];
+       vdir[2] = -mat[10];
+
+
        g3d_light_pos(0, -10, 10, 20);
 
        zsort_mesh(&torus);
@@ -114,7 +134,8 @@ static void draw(void)
        g3d_mtl_diffuse(0.4, 0.7, 1.0);
        g3d_set_texture(tex.width, tex.height, tex.pixels);
 
-       draw_mesh(&torus);
+       /*draw_mesh(&torus);*/
+       draw_bsp(&torus_bsp, vdir[0], vdir[1], vdir[2]);
 
        /*draw_mesh(&cube);*/
        swap_buffers(fb_pixels);