From: Lukas Krickl <lukas@krickl.dev>
Date: Tue, 24 Feb 2026 16:37:08 +0000 (+0100)
Subject: tile drawing: wip isometric rendering
X-Git-Url: https://git.krickl.dev/?a=commitdiff_plain;h=d24cdc14053e7ef0d3bb73805a49e434486d85a4;p=lrts%2F.git

tile drawing: wip isometric rendering
---

diff --git a/src/lrts.c b/src/lrts.c
index 2245bf0..f10e157 100644
--- a/src/lrts.c
+++ b/src/lrts.c
@@ -60,7 +60,12 @@ struct u_vec2 lrts_get_screen_res(void) {
 	return screen_res;
 }
 
+void lrts_init(void) {
+}
+
 int lrts_main(int argc, char **argv) {
+	lrts_init();
+
 	p_io_init();
   lrts_getopt(argc, argv, lrts_cfg());
 	
diff --git a/src/r_assets.c b/src/r_assets.c
index 7b36631..902f2fc 100644
--- a/src/r_assets.c
+++ b/src/r_assets.c
@@ -6,14 +6,21 @@
 void r_draw_solid_isometric_tile(i32 x, i32 y, r_color color, r_color outline_color) {
 	u32 i = 0;
 	u32 j = 0;
+	i32 ox = 0;
+	i32 oy = 0;
+
+	/* converted origin point in isometric space */
+	ox = (x * R_TILE_W / 2) + (y * R_TILE_W / 2);;
+	oy = (y * R_TILE_H / 2) - (x * R_TILE_H / 2);
 
 	LRTS_UNUSED(outline_color);
 	LRTS_UNUSED(x);
 	LRTS_UNUSED(y);
-
+	
+	/* draw a tile texture from origin */
 	for (i = 0; i < R_TILE_W; i++) {
 		for (j = 1; j < R_TILE_H-1; j++) {
-			r_draw_pixel(&r_framebuffer, x+i, y+j, color);
+			r_draw_pixel(&r_framebuffer, ox, oy, color);
 		}
 	}
 }
diff --git a/src/r_render.c b/src/r_render.c
index c0d5b75..b8a7455 100644
--- a/src/r_render.c
+++ b/src/r_render.c
@@ -28,7 +28,7 @@ void r_render_frame() {
 	
 	/* draw test tile */
 	t.type = T_TILE_TYPE_GRASS;
-	r_draw_tile(&t, 128, 128);
+	r_draw_tile(&t, 0, 0);
 
 	p_draw_end();
 	p_draw_present();