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KGL: Support GL_TRIANGLE_FAN

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This commit is contained in:
Sam Steele 2005-11-19 17:30:49 +00:00
parent 7a1053faea
commit c04bf69469
1 changed files with 66 additions and 0 deletions
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66
gldraw.c
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@ -141,6 +141,67 @@ sizeof(gl_vertex_t)); */
} }
} }
static void end_triangle_fan() {
int i;
volatile pvr_vertex_t *vert;
pvr_dr_state_t dr_state;
pvr_dr_init(dr_state);
/* Should be at least 3 points in the buffer */
assert_msg(gl_vbuf_top >= 3, "Need at least three vertices.");
gl_vbuf[0].flags = PVR_CMD_VERTEX_EOL;
for (i=0; i<gl_vbuf_top; i++) {
float x = gl_vbuf[i].x, y = gl_vbuf[i].y, z = gl_vbuf[i].z, w = 1.0f;
mat_trans_single4(x, y, z, w);
gl_xbuf[i].x = x;
gl_xbuf[i].y = y;
if (w == 1.0f)
gl_xbuf[i].z = ((gl_viewport_scale[2] * z) + gl_viewport_offset[2]);
else
gl_xbuf[i].z = w;
}
/* Throw it all to the TA using direct render */
if (check_w(gl_xbuf, gl_vbuf_top))
for (i=1; i<gl_vbuf_top-1; i++) {
vert = pvr_dr_target(dr_state);
vert->flags = gl_vbuf[i].flags;
vert->x = gl_xbuf[i].x;
vert->y = gl_xbuf[i].y;
vert->z = gl_xbuf[i].z;
vert->u = gl_vbuf[i].u;
vert->v = gl_vbuf[i].v;
vert->argb = gl_vbuf[i].argb;
vert->oargb = gl_vbuf[i].oargb;
pvr_dr_commit(vert);
vert = pvr_dr_target(dr_state);
vert->flags = gl_vbuf[i+1].flags;
vert->x = gl_xbuf[i+1].x;
vert->y = gl_xbuf[i+1].y;
vert->z = gl_xbuf[i+1].z;
vert->u = gl_vbuf[i+1].u;
vert->v = gl_vbuf[i+1].v;
vert->argb = gl_vbuf[i+1].argb;
vert->oargb = gl_vbuf[i+1].oargb;
pvr_dr_commit(vert);
vert = pvr_dr_target(dr_state);
vert->flags = gl_vbuf[0].flags;
vert->x = gl_xbuf[0].x;
vert->y = gl_xbuf[0].y;
vert->z = gl_xbuf[0].z;
vert->u = gl_vbuf[0].u;
vert->v = gl_vbuf[0].v;
vert->argb = gl_vbuf[0].argb;
vert->oargb = gl_vbuf[0].oargb;
pvr_dr_commit(vert);
}
}
static void end_triangle_strip() { static void end_triangle_strip() {
int i; int i;
volatile pvr_vertex_t *vert; volatile pvr_vertex_t *vert;
@ -348,6 +409,8 @@ static void check_end() {
break; break;
case GL_TRIANGLE_STRIP: case GL_TRIANGLE_STRIP:
break; break;
case GL_TRIANGLE_FAN:
break;
case GL_QUADS: case GL_QUADS:
if (gl_vbuf_top == 4) { if (gl_vbuf_top == 4) {
end_quads(); end_quads();
@ -454,6 +517,9 @@ void glEnd(void) {
case GL_TRIANGLE_STRIP: case GL_TRIANGLE_STRIP:
end_triangle_strip(); end_triangle_strip();
break; break;
case GL_TRIANGLE_FAN:
end_triangle_fan();
break;
case GL_QUADS: case GL_QUADS:
break; break;
case GL_QUAD_STRIP: case GL_QUAD_STRIP: