Update teapot model, add phong shading, & more

1 files changed, 11 insertions, 4 deletions

diff --git a/shaders/obj.vert.slang b/shaders/obj.vert.slang
index 2d45e1d..1884b97 100644
--- a/shaders/obj.vert.slang
+++ b/shaders/obj.vert.slang
@@ -20,6 +20,8 @@
 struct ObjUniforms {
     float4x4 mvp;
     float4x4 model;
+    float3   camera_position;
+    float    padding;
 };
 
 [[vk::binding(0, 1)]]
@@ -31,13 +33,18 @@ struct VSInput {
 };
 
 struct VSOutput {
-    float4 position : SV_Position;
-    float3 normal : TEXCOORD0;
+    float4 position        : SV_Position;
+    float3 normal          : TEXCOORD0;
+    float3 world_position  : TEXCOORD1;
+    float3 camera_position : TEXCOORD2;
 };
 
 VSOutput main(VSInput input) {
     VSOutput output;
-    output.position = mul(uniforms.mvp, float4(input.position, 1.0));
-    output.normal = normalize(mul((float3x3)uniforms.model, input.normal));
+    float4 world_position  = mul(uniforms.model, float4(input.position, 1.0));
+    output.position        = mul(uniforms.mvp, float4(input.position, 1.0));
+    output.normal          = normalize(mul((float3x3)uniforms.model, input.normal));
+    output.world_position  = world_position.xyz;
+    output.camera_position = uniforms.camera_position;
     return output;
 }