/* Draw a tile */
void draw_tile( int index )
{
if ( index > get_tile_count() )
return;
/* Enable textures */
glEnable( GL_TEXTURE_2D );
/* Bind the tilebay texture */
glBindTexture( GL_TEXTURE_2D, tilebay[index].gl_index );
/* Send the vertex/texture coordinates */
glBegin( GL_QUADS );
/* Top Left */
glTexCoord2f( 0.0f, 1.0f );
glVertex3f( 0.0f, 0.0f, 0.0f );
/* Top Right */
glTexCoord2f( 1.0f, 1.0f );
glVertex3f( TILE_SIZE, 0.0f, 0.0f );
/* Bottom Right */
glTexCoord2f( 1.0f, 0.0f );
glVertex3f( TILE_SIZE, TILE_SIZE, 0.0f );
/* Bottom Left */
glTexCoord2f( 0.0f, 0.0f );
glVertex3f( 0.0f, TILE_SIZE, 0.0f );
glEnd();
/* Disable textures */
glDisable( GL_TEXTURE_2D );
}
static void draw_camera(int i, int j, int f, float a)
{
struct camera *c = get_camera(i);
init_camera(i);
if (c->frame)
{
/* Apply a basic projection for offscreen rendering. */
glMatrixMode(GL_PROJECTION);
{
glPushMatrix();
glLoadIdentity();
if (c->type == CAMERA_ORTHO)
glOrtho (c->l, c->r, c->b, c->t, c->n, c->f);
else
glFrustum(c->l, c->r, c->b, c->t, c->n, c->f);
}
glMatrixMode(GL_MODELVIEW);
{
glPushMatrix();
glLoadIdentity();
}
/* Render the scene to the offscreen buffer. */
glPushAttrib(GL_VIEWPORT_BIT | GL_SCISSOR_BIT);
{
int w = get_image_w(c->image);
int h = get_image_h(c->image);
glViewport(0, 0, w, h);
glScissor (0, 0, w, h);
opengl_push_framebuffer(c->frame);
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
draw_scene(j, f, a);
}
opengl_pop_framebuffer();
}
glPopAttrib();
/* Revert the projection. */
glMatrixMode(GL_PROJECTION);
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
}
else
{
int eye;
int tile;
int pass;
/* Iterate over all tiles of this host. */
for (tile = 0; tile < (int) get_tile_count(); ++tile)
{
float d[2][3];
/* Iterate over the eyes. */
get_eye_pos(d[0], c, 0, tile);
get_eye_pos(d[1], c, 1, tile);
for (eye = 0; eye < (c->mode ? 2 : 1); ++eye)
{
camera_eye = eye;
if (draw_tile(c, eye, tile, d[eye]))
{
pass = 0;
/* Iterate over all passes of this eye and tile. */
while ((pass = draw_pass(c->mode, eye, tile, pass, d)))
{
if (get_tile_flags(tile) & TILE_TEST_COLOR)
draw_color(j, eye);
else if (get_tile_flags(tile) & TILE_TEST_GHOST)
draw_ghost(j, eye);
else
draw_scene(j, f, a);
}
}
}
}
/* HACK */
if (c->mode != STEREO_VARRIER_00)
opengl_set_fence();
}
}
