添加多模型渲染，添加贴图渲染，添加平行光， 暂时不上传assets

shaders/simple_shader.vert

@@ -1,15 +1,39 @@
 #version 450
 
-layout(location = 0) in vec3 inPosition;
-layout(location = 1) in vec3 inColor;
+const int MAX_LIGHTS = 4;
 
-layout(location = 0) out vec3 fragColor;
+struct Light {
+    vec4 direction;
+    vec4 color;
+};
+
+layout(location = 0) in vec3 inPosition;
+layout(location = 1) in vec3 inNormal;
+layout(location = 2) in vec2 inUV;
+
+layout(location = 0) out vec2 fragUV;
+layout(location = 1) out vec3 fragNormal;
+layout(location = 2) out vec3 fragWorldPos;
+
+layout(push_constant) uniform PushConstants {
+    mat4 model;
+} pc;
 
 layout(set = 0, binding = 0) uniform UniformBufferObject {
-    mat4 mvp;
+    mat4 view;
+    mat4 proj;
+    vec4 ambientColor;
+    Light lights[MAX_LIGHTS];
 } ubo;
 
 void main() {
-    gl_Position = ubo.mvp * vec4(inPosition, 1.0);
-    fragColor = inColor;
+    vec4 worldPos = pc.model * vec4(inPosition, 1.0);
+    gl_Position = ubo.proj * ubo.view * worldPos;
+
+    fragWorldPos = worldPos.xyz;
+
+    mat3 normalMatrix = mat3(transpose(inverse(pc.model)));
+    fragNormal = normalize(normalMatrix * inNormal);
+
+    fragUV = inUV;
 }