Add simple shadowsHEADmaster

1 files changed, 15 insertions, 10 deletions

diff --git a/shaders/model.vert.slang b/shaders/model.vert.slang
index 380ff37..3ddb39d 100644
--- a/shaders/model.vert.slang
+++ b/shaders/model.vert.slang
@@ -19,8 +19,9 @@
 struct model_uniforms {
     float4x4 mvp;
     float4x4 model;
+    float4x4 light_view_projection;
     float3   camera_position;
-    float    padding;
+    float    shadow_normal_offset;
 };
 
 [[vk::binding(0, 1)]]
@@ -32,18 +33,22 @@ struct VSInput {
 };
 
 struct VSOutput {
-    float4 position        : SV_Position;
-    float3 normal          : TEXCOORD0;
-    float3 world_position  : TEXCOORD1;
-    float3 camera_position : TEXCOORD2;
+    float4 position              : SV_Position;
+    float3 normal                : TEXCOORD0;
+    float3 world_position        : TEXCOORD1;
+    float3 camera_position       : TEXCOORD2;
+    float4 light_space_position  : TEXCOORD3;
 };
 
 VSOutput main(VSInput input) {
     VSOutput output;
-    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;
+    float4 world_position       = mul(uniforms.model, float4(input.position, 1.0));
+    float3 world_normal         = normalize(mul((float3x3)uniforms.model, input.normal));
+    output.position             = mul(uniforms.mvp, float4(input.position, 1.0));
+    output.normal               = world_normal;
+    output.world_position       = world_position.xyz;
+    output.camera_position      = uniforms.camera_position;
+    float3 offset_position      = world_position.xyz + world_normal * uniforms.shadow_normal_offset;
+    output.light_space_position = mul(uniforms.light_view_projection, float4(offset_position, 1.0));
     return output;
 }
\ No newline at end of file