From 5ecc42ab89e4ee162b18f07b4aa63f4d993e15da Mon Sep 17 00:00:00 2001
From: nothke <nothke@gmail.com>
Date: Wed, 12 Jun 2024 00:43:10 +0200
Subject: [PATCH] Drawing a quad

---
 src/main.zig | 13 +++++++++++--
 todo.todo    |  3 ++-
 2 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/src/main.zig b/src/main.zig
index 1178943..79f6e74 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -11,6 +11,7 @@ const state = struct {
     var bind: sg.Bindings = .{};
     var pip: sg.Pipeline = .{};
     var vsParams: shader.FsParams = .{ .offset = .{ 0, 0, 0 } };
+    var indexCount: u16 = 0;
 };
 
 export fn init() void {
@@ -28,15 +29,23 @@ export fn init() void {
         0.0,  0.5,  0.5, 1.0, 0.0, 0.0, 1.0,
         0.5,  -0.5, 0.5, 0.0, 1.0, 0.0, 1.0,
         -0.5, -0.5, 0.5, 0.0, 0.0, 1.0, 1.0,
+        0.7,  0.5,  0.5, 0.0, 1.0, 0.0, 1.0,
     };
 
     state.bind.vertex_buffers[0] = sg.makeBuffer(.{
         .data = sg.asRange(&triangleVerts),
     });
 
+    const indexBuffer = [_]u16{
+        0, 1, 2,
+        0, 3, 1,
+    };
+
+    state.indexCount = indexBuffer.len;
+
     state.bind.index_buffer = sg.makeBuffer(.{
         .type = .INDEXBUFFER,
-        .data = sg.asRange(&[_]u16{ 0, 1, 2 }),
+        .data = sg.asRange(&indexBuffer),
     });
 
     var pip_desc: sg.PipelineDesc = .{
@@ -71,7 +80,7 @@ export fn frame() void {
     state.vsParams.offset[0] = col.r;
     sg.applyUniforms(.FS, shader.SLOT_fs_params, sg.asRange(&state.vsParams));
     sg.applyBindings(state.bind);
-    sg.draw(0, 3, 1);
+    sg.draw(0, state.indexCount, 1);
     sg.endPass();
 
     sg.commit();
diff --git a/todo.todo b/todo.todo
index 17757e4..a8ef412 100644
--- a/todo.todo
+++ b/todo.todo
@@ -9,7 +9,8 @@ Today:
     ☐ Guide through the code
 
     Draw a circle!:
-        ☐ Draw indices instead of triangle elements
+        ✔ Draw indices instead of triangle elements @done(24-06-12 00:29)
+        ☐ Quad
         ☐ Create a circle vertices
         ☐ Draw the circle
         ☐ Make the circle move with uniforms
\ No newline at end of file