added {vertex,index} buffers

1 files changed, 13 insertions, 21 deletions

diff --git a/src/shaders/shader.slang b/src/shaders/shader.slang
index b5f7a54..37041c6 100644
--- a/src/shaders/shader.slang
+++ b/src/shaders/shader.slang
@@ -1,30 +1,22 @@
-static float2 positions[3] = float2[] (
-    float2( 0.0, -0.5),
-    float2( 0.5,  0.5),
-    float2(-0.5,  0.5),
-);
-
-static float3 colors[3] = float3[] (
-    float3(1.0, 0.0, 0.0),
-    float3(0.0, 1.0, 0.0),
-    float3(0.0, 0.0, 1.0),
-);
+struct VertexInput {
+    float2 pos;
+    float3 col;
+};
 
 struct VertexOutput {
-    float3 color;
-    float4 sv_position : SV_Position;
+    float4 pos : SV_Position;
+    float3 col;
 };
 
 [shader("vertex")]
-VertexOutput vert_main(uint vid : SV_VertexID) {
-    VertexOutput output;
-    output.color = colors[vid];
-    output.sv_position = float4(positions[vid], 0.0, 1.0);
-    return output;
+VertexOutput vert_main(VertexInput vi) {
+    VertexOutput vo;
+    vo.pos = float4(vi.pos, 0., 1.);
+    vo.col = vi.col;
+    return vo;
 }
 
 [shader("fragment")]
-float4 frag_main(VertexOutput vert) : SV_Target {
-    float3 color = vert.color;
-    return float4(color, 1.0);
+float4 frag_main(VertexOutput vo) : SV_Target {
+    return float4(vo.col, 1.);
 }