feat: engine as library

engine/src/shaders/main.vs

@@ -0,0 +1,36 @@
+#version 460 core
+
+// Input vertex attributes
+layout (location = 0) in vec3 position;  // Vertex position in local space (model space)
+layout (location = 1) in vec3 normal;    // vertex normal
+layout (location = 2) in vec2 texCoord;     // Vertex texture uv
+layout (location = 3) in mat4 instanceModel;     // Vertex texture uv
+
+// Output to fragment shader
+out vec3 vertexPos;
+out vec3 vertexNormal;
+out vec2 TexCoords;
+out vec4 fragPosLightSpace;
+
+// Uniforms for transformation matrices
+uniform mat4 u_model;       // Model matrix: transforms from local space to world space
+uniform mat4 u_view;        // View matrix: transforms from world space to camera space (view space)
+uniform mat4 u_projection;  // Projection matrix: transforms from camera space to clip space
+uniform bool u_isInstanced;
+
+void main()
+{
+    mat4 model = u_isInstanced ? instanceModel : u_model;
+
+    vertexPos = vec3(model * vec4(position, 1.0));
+
+    mat3 normalMatrix = mat3(transpose(inverse(model)));
+    vertexNormal = normalMatrix * normal;
+    // vertexNormal = normal;
+
+    TexCoords = texCoord;
+
+    // fragPosLightSpace = u_lightSpace * vec4(vertexPos, 1.0);
+
+    gl_Position = u_projection * u_view * vec4(vertexPos, 1.0);
+}