major bsp bugs fixed

[dosdemo] / tools / gltest / src / main.c

diff --git a/tools/gltest/src/main.c b/tools/gltest/src/main.c
index 82042ca..3e1ea8f 100644 (file)
--- a/tools/gltest/src/main.c
+++ b/tools/gltest/src/main.c
@@ -19,6 +19,9 @@ static int bnstate[8];
 /* ----------------------------------- */
 static struct g3d_mesh torus;
 static struct bsptree torus_bsp;
+
+static int rebuild_bsp;
+int debug_max_clip_level = 0;
 /* ----------------------------------- */
 
 int main(int argc, char **argv)
@@ -46,7 +49,6 @@ int main(int argc, char **argv)
 int init(void)
 {
        glEnable(GL_DEPTH_TEST);
-       glEnable(GL_CULL_FACE);
        glEnable(GL_LIGHTING);
        glEnable(GL_LIGHT0);
 
@@ -68,11 +70,64 @@ void cleanup(void)
        destroy_bsp(&torus_bsp);
 }
 
+static void draw_plane(struct bspnode *n)
+{
+       int i;
+       float cx = 0, cy = 0, cz = 0;
+
+       for(i=0; i<n->vcount; i++) {
+               cx += n->verts[i].x;
+               cy += n->verts[i].y;
+               cz += n->verts[i].z;
+       }
+       cx /= n->vcount;
+       cy /= n->vcount;
+       cz /= n->vcount;
+
+       glPushAttrib(GL_ENABLE_BIT);
+       glDisable(GL_CULL_FACE);
+       glDisable(GL_LIGHTING);
+       glEnable(GL_BLEND);
+       glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+
+       glPushMatrix();
+       glTranslatef(cx, cy, cz);
+       glScalef(10, 10, 10);
+       glTranslatef(-cx, -cy, -cz);
+
+       glBegin(GL_POLYGON);
+       glColor4f(0.2, 0.3, 1.0, 0.5);
+       for(i=0; i<n->vcount; i++) {
+               glVertex3f(n->verts[i].x, n->verts[i].y, n->verts[i].z);
+       }
+       glEnd();
+
+       glBegin(GL_LINE_LOOP);
+       glColor4f(0.2, 0.3, 1.0, 0.85);
+       for(i=0; i<n->vcount; i++) {
+               glVertex3f(n->verts[i].x, n->verts[i].y, n->verts[i].z);
+       }
+       glEnd();
+
+       glPopMatrix();
+       glPopAttrib();
+}
+
 void display(void)
 {
        float vdir[3];
        float mat[16];
 
+       if(rebuild_bsp) {
+               destroy_bsp(&torus_bsp);
+               init_bsp(&torus_bsp);
+               if(bsp_add_mesh(&torus_bsp, &torus) == -1) {
+                       fprintf(stderr, "failed to construct torus BSP tree\n");
+                       abort();
+               }
+               rebuild_bsp = 0;
+       }
+
        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
        glMatrixMode(GL_MODELVIEW);
@@ -89,6 +144,8 @@ void display(void)
        //g3d_draw_indexed(torus.prim, torus.varr, torus.vcount, torus.iarr, torus.icount);
        draw_bsp(&torus_bsp, vdir[0], vdir[1], vdir[2]);
 
+       draw_plane(torus_bsp.root);
+
        glutSwapBuffers();
 }
 
@@ -105,6 +162,23 @@ void keydown(unsigned char key, int x, int y)
        switch(key) {
        case 27:
                exit(0);
+
+       case '=':
+               debug_max_clip_level++;
+               printf("max_clip_level: %d\n", debug_max_clip_level);
+               rebuild_bsp = 1;
+               glutPostRedisplay();
+               break;
+
+       case '-':
+               if(--debug_max_clip_level < 0) {
+                       debug_max_clip_level = 0;
+               } else {
+                       printf("max_clip_level: %d\n", debug_max_clip_level);
+                       rebuild_bsp = 1;
+                       glutPostRedisplay();
+               }
+               break;
        }
 }