Additional resources from the Raylib repo.

Examples/resources/shaders/glsl330/cel.vs

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+#version 330
+
+// Raylib standard attributes
+in vec3 vertexPosition;
+in vec2 vertexTexCoord;
+in vec3 vertexNormal;
+in vec4 vertexColor;
+
+// Raylib standard uniforms
+uniform mat4 mvp;
+uniform mat4 matModel;
+uniform mat4 matNormal;
+
+out vec3 fragPosition;
+out vec2 fragTexCoord;
+out vec4 fragColor;
+out vec3 fragNormal;
+
+void main() {
+    fragPosition = vec3(matModel * vec4(vertexPosition, 1.0));
+    fragTexCoord = vertexTexCoord;
+    fragColor = vertexColor;
+    fragNormal = normalize(vec3(matNormal * vec4(vertexNormal, 0.0)));
+    gl_Position = mvp * vec4(vertexPosition, 1.0);
+}