Dumb near plane clipping.

2 files changed, 10 insertions, 2 deletions

diff --git a/3de.c b/3de.c
index 98ae884..5b5bcc3 100644
--- a/3de.c
+++ b/3de.c
@@ -86,6 +86,7 @@ int entrypoint(int argc, const char** argv, Arena* a) {
 				sprintf(buf, "MOUSE: %d, %d", app->mx, app->my);
 				ren_texts(&r, blue, 3, 13, buf);
 				draw_monkey(&r);
+				draw_tri(&r, app->mx, app->my);
 			ren_end(&r);
 			app_end(app);
 			fps_update(&f);
diff --git a/render.c b/render.c
index e225bb6..14aa6a1 100644
--- a/render.c
+++ b/render.c
@@ -161,7 +161,7 @@ void ren_begin(Renderer* r, Colour* t, int* d, int w, int h) {
 	r->vp[2] = w;
 	r->vp[3] = h;
 	r->asp = (w << fbits) / h;
-	r->n = 8;
+	r->n = 256;
 }
 
 void ren_end(Renderer* r) {
@@ -512,12 +512,19 @@ void ren_tri3(
 	const Bitmap* tex
 ) {
 #define ec 8
-#define ec2 (ec * 2)
+#define ec2 (ec)
 	int tri[ec2 * 3];
 	int tc = 1, i;
 	vec_cpy(&tri[0],  iv0, ec);
 	vec_cpy(&tri[8],  iv1, ec);
 	vec_cpy(&tri[16], iv2, ec);
+	if (tri[2]  < r->n) tri[2] = r->n;
+	if (tri[10] < r->n) tri[10] = r->n;
+	if (tri[18] < r->n) tri[18] = r->n;
+	if (
+		tri[2] == tri[10] &&
+		tri[2] == tri[18]
+	) return;
 	for (i = 0; i < tc; i++) {
 		int ti = i * ec, j;
 		for (j = 0; j < 3; j++) {