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create ModelGraphicsInstance and include inverse transpose matrix for normals

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This commit is contained in:
Rhys Lloyd
2023-09-30 13:00:01 -07:00
parent 602816a618
commit 5cd40afa56
4 changed files with 38 additions and 22 deletions
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7
src/shader.wgsl
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@@ -42,7 +42,8 @@ fn vs_sky(@builtin(vertex_index) vertex_index: u32) -> SkyOutput {
}
struct ModelInstance{
model_transform:mat4x4<f32>,
transform:mat4x4<f32>,
normal_transform:mat4x4<f32>,
color:vec4<f32>,
}
//my fancy idea is to create a megatexture for each model that includes all the textures each intance will need
@@ -75,9 +76,9 @@ fn vs_entity_texture(
@location(2) normal: vec3<f32>,
@location(3) color: vec4<f32>,
) -> EntityOutputTexture {
var position: vec4<f32> = model_instances[instance].model_transform * vec4<f32>(pos, 1.0);
var position: vec4<f32> = model_instances[instance].transform * vec4<f32>(pos, 1.0);
var result: EntityOutputTexture;
result.normal = (model_instances[instance].model_transform * vec4<f32>(normal, 0.0)).xyz;
result.normal = (model_instances[instance].normal_transform * vec4<f32>(normal, 1.0)).xyz;
result.texture = texture;
result.color = color;
result.model_color = model_instances[instance].color;