nuclear@3: #include "m3dimpl.h"
nuclear@9: #include "lines.h"
nuclear@3: 
nuclear@3: 
nuclear@9: void m3d_draw_point(struct min3d_vertex *v)
nuclear@3: {
nuclear@5: 	int x = v->pos[0] + 0.5;
nuclear@5: 	int y = v->pos[1] + 0.5;
nuclear@5: 	int xsz = m3dctx->cbuf->xsz;
nuclear@9: 	m3dctx->cbuf->pixels[y * xsz + x] = v->color;
nuclear@3: }
nuclear@3: 
nuclear@9: void m3d_draw_line(struct min3d_vertex *v)
nuclear@3: {
nuclear@9: 	int x0, y0, x1, y1;
nuclear@9: 
nuclear@9: 	x0 = v[0].pos[0];
nuclear@9: 	y0 = v[0].pos[1];
nuclear@9: 	x1 = v[1].pos[0];
nuclear@9: 	y1 = v[1].pos[1];
nuclear@9: 
nuclear@9: 	if(clip_line2d(&x0, &y0, &x1, &y1, m3dctx->vport)) {
nuclear@9: 		draw_line(m3dctx->cbuf->pixels, m3dctx->cbuf->xsz, v->color, x0, y0, x1, y1);
nuclear@9: 	}
nuclear@3: }
nuclear@3: 
nuclear@9: void m3d_draw_poly(struct min3d_vertex *v, int numv)
nuclear@3: {
nuclear@9: 	int i;
nuclear@9: 	struct min3d_vertex last[2];
nuclear@9: 
nuclear@9: 	if(ENABLED(M3D_CULL_FACE)) {
nuclear@9: 		float a[2], b[2], crossz = 0;
nuclear@9: 
nuclear@9: 		for(i=1; i<numv - 1; i++) {
nuclear@9: 			int n = i + 1;
nuclear@9: 			a[0] = v[i].pos[0] - v[0].pos[0];
nuclear@9: 			a[1] = v[i].pos[1] - v[0].pos[1];
nuclear@9: 
nuclear@9: 			b[0] = v[n].pos[0] - v[0].pos[0];
nuclear@9: 			b[1] = v[n].pos[1] - v[0].pos[1];
nuclear@9: 
nuclear@9: 			crossz += a[0] * b[1] - a[1] * b[0];
nuclear@9: 		}
nuclear@9: 
nuclear@9: 		if(crossz < 0) return;
nuclear@9: 	}
nuclear@9: 
nuclear@9: 	last[0] = v[numv - 1];
nuclear@9: 	last[1] = v[0];
nuclear@9: 
nuclear@9: 	for(i=0; i<numv - 1; i++) {
nuclear@9: 		m3d_draw_line(v++);
nuclear@9: 	}
nuclear@9: 	m3d_draw_line(last);
nuclear@3: }