I need to go deeper

[dosdemo] / src / polytest.c

diff --git a/src/polytest.c b/src/polytest.c
index 8d81262..937c9c2 100644 (file)
--- a/src/polytest.c
+++ b/src/polytest.c
@@ -91,7 +91,7 @@ static void start(long trans_time)
        g3d_enable(G3D_LIGHTING);
        g3d_enable(G3D_LIGHT0);
 
-       g3d_polygon_mode(G3D_TEX_GOURAUD);
+       g3d_polygon_mode(G3D_GOURAUD);
 }
 
 static void update(void)
@@ -102,6 +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);
@@ -116,6 +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);
@@ -123,8 +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_bsp(&torus_bsp);*/
+       /*draw_mesh(&torus);*/
+       draw_bsp(&torus_bsp, vdir[0], vdir[1], vdir[2]);
 
        /*draw_mesh(&cube);*/
        swap_buffers(fb_pixels);