Additional resources from the Raylib repo.

Examples/resources/shaders/glsl100/voxel_lighting.vs

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+#version 100
+
+precision mediump float;
+
+// Input vertex attributes
+attribute vec3 vertexPosition;
+attribute vec3 vertexNormal;
+attribute vec4 vertexColor;
+// attribute vec2 vertexTexCoord;
+
+// Input uniform values
+uniform mat4 mvp;
+uniform mat4 matModel;
+uniform mat4 matNormal;
+
+// Output to fragment shader
+varying vec3 fragPosition;
+varying vec4 fragColor;
+varying vec3 fragNormal;
+
+void main()
+{
+    fragPosition = vec3(matModel*vec4(vertexPosition, 1.0));
+    fragColor = vertexColor;
+    fragNormal = normalize(vec3(matNormal*vec4(vertexNormal, 1.0)));
+
+    gl_Position = mvp*vec4(vertexPosition, 1.0);
+}