From e7ae07ae13ff73634e6dccb6993f0c8a2192b3d4 Mon Sep 17 00:00:00 2001
From: Samuel Walker <swalker@piwalker.net>
Date: Fri, 28 Mar 2025 10:28:22 -0600
Subject: [PATCH] Square with changing colors
---
main.c | 29 ++++++++++++++++-------------
1 file changed, 16 insertions(+), 13 deletions(-)
diff --git a/main.c b/main.c
index 4c975c2..93f98db 100644
--- a/main.c
+++ b/main.c
@@ -76,10 +76,13 @@ int gs_init(int width, int height, int psm, int psmz, int vmode, int gmode) {
return 0;
}
-static int tri[] = {
- 10, 10, 0,
- 600, 200, 0,
- 20, 400, 0
+static int verts[] = {
+ 100, 100, 0,
+ 300, 100, 0,
+ 100, 300, 0,
+ 300, 100, 0,
+ 300, 300, 0,
+ 100, 300, 0
};
#define SHIFT_AS_I64(x, b) (((uint64_t)x)<<b);
@@ -96,8 +99,8 @@ int draw() {
q = draw_clear(q, 0, 2048.0f - 320, 2048.0f - 244, VID_W, VID_H, 20, 20, 20);
//q = draw_enable_tests(q, 0, z);
// GIFTag header - 3x(col, pos)
- q->dw[0] = 0x7000000000000001;
- q->dw[1] = 0x0000000005151510;
+ q->dw[0] = 0xD000000000000001;
+ q->dw[1] = 0x0005151515151510;
q++;
q->dw[0] = GS_PRIM_TRIANGLE;
@@ -107,15 +110,15 @@ int draw() {
int cx = myftoi4(2048 - (VID_W/2));
int cy = myftoi4(2048 - (VID_H/2));
- for(int i = 0; i < 3; i++){
+ for(int i = 0; i < 6; i++){
q->dw[0] = (red&0xff) | (green&0xff)<<32;
q->dw[1] = (blue&0xff) | SHIFT_AS_I64(0x80, 32);
q++;
int base = i*3;
- int x = myftoi4(tri[base+0]) + cx;
- int y = myftoi4(tri[base+1]) + cy;
- int z = myftoi4(tri[base+2]);
+ int x = myftoi4(verts[base+0]) + cx;
+ int y = myftoi4(verts[base+1]) + cy;
+ int z = myftoi4(verts[base+2]);
q->dw[0] = x | SHIFT_AS_I64(y, 32);
q->dw[1] = z;
q++;
@@ -148,9 +151,9 @@ int main() {
z = malloc(sizeof(zbuffer_t));
while(1) {
- tri[0]++;
- if(tri[0] > 480) {
- tri[0] = 0;
+ red++;
+ if(red > 0xFF) {
+ red = 0;
}
draw();
graph_wait_vsync();