Stream: Now doing indexed rendering

src/main.zig

@@ -9,7 +9,6 @@ var pass_action: sg.PassAction = .{};
 
 const state = struct {
     var bind: sg.Bindings = .{};
-    var bind2: sg.Bindings = .{};
     var pip: sg.Pipeline = .{};
     var vsParams: shader.FsParams = .{ .offset = .{ 0, 0, 0 } };
 };
@@ -35,15 +34,13 @@ export fn init() void {
         .data = sg.asRange(&triangleVerts),
     });
 
-    for (&triangleVerts) |*vert| {
+    state.bind.index_buffer = sg.makeBuffer(.{
-        vert.* += 0.2;
+        .type = .INDEXBUFFER,
-    }
+        .data = sg.asRange(&[_]u16{ 0, 1, 2 }),
-
-    state.bind2.vertex_buffers[0] = sg.makeBuffer(.{
-        .data = sg.asRange(&triangleVerts),
     });
 
     var pip_desc: sg.PipelineDesc = .{
+        .index_type = .UINT16,
         .shader = sg.makeShader(shader.triangleShaderDesc(sg.queryBackend())),
     };
 
@@ -75,12 +72,8 @@ export fn frame() void {
     sg.applyUniforms(.FS, shader.SLOT_fs_params, sg.asRange(&state.vsParams));
     sg.applyBindings(state.bind);
     sg.draw(0, 3, 1);
-
-    state.vsParams.offset[0] = col.g;
-    sg.applyUniforms(.FS, shader.SLOT_fs_params, sg.asRange(&state.vsParams));
-    sg.applyBindings(state.bind2);
-    sg.draw(0, 3, 1);
     sg.endPass();
+
     sg.commit();
 }
 

todo.todo

@@ -0,0 +1,15 @@
+
+
+
+What are we doing here?:
+    ☐ using sokol in zig
+    ☐ part of a gamejam
+
+Today:
+    ☐ Guide through the code
+
+    Draw a circle!:
+        ☐ Draw indices instead of triangle elements
+        ☐ Create a circle vertices
+        ☐ Draw the circle
+        ☐ Make the circle move with uniforms