Lightmap example. (#3043)

examples/shaders/resources/LICENSE.md

@@ -9,3 +9,5 @@
 | raysan.png         | [@raysan5](https://github.com/raysan5)      | [CC0](https://creativecommons.org/publicdomain/zero/1.0/)   | - |
 | space.png          | ❔             | ❔       | - |
 | texel_checker.png  | [@raysan5](https://github.com/raysan5)      | [CC0](https://creativecommons.org/publicdomain/zero/1.0/)   | Made with [UV Checker Map Maker](http://uvchecker.byvalle.com/) |
+| cubicmap.png       | [@raysan5](https://github.com/raysan5)    | [CC0](https://creativecommons.org/publicdomain/zero/1.0/)     | - |
+| spark_flame.png      | [@raysan5](https://github.com/raysan5)    | [CC0](https://creativecommons.org/publicdomain/zero/1.0/)     | Made with [EffectTextureMaker](https://mebiusbox.github.io/contents/EffectTextureMaker/) |

examples/shaders/resources/shaders/glsl330/lightmap.fs

@@ -0,0 +1,20 @@
+#version 330
+// Input vertex attributes (from vertex shader)
+in vec2 fragTexCoord;
+in vec2 fragTexCoord2;
+in vec3 fragPosition;
+in vec4 fragColor;
+
+// Input uniform values
+uniform sampler2D texture0;
+uniform sampler2D texture1;
+
+// Output fragment color
+out vec4 finalColor;
+
+void main() {
+	// Texel color fetching from texture sampler
+    vec4 texelColor = texture( texture0, fragTexCoord );
+    vec4 texelColor2 = texture( texture1, fragTexCoord2 );
+	finalColor = texelColor * texelColor2;
+}

examples/shaders/resources/shaders/glsl330/lightmap.vs

@@ -0,0 +1,27 @@
+#version 330
+// Input vertex attributes
+in vec3 vertexPosition;
+in vec2 vertexTexCoord;
+in vec2 vertexTexCoord2;
+in vec4 vertexColor;
+
+// Input uniform values
+uniform mat4 mvp;
+uniform mat4 matModel;
+
+// Output vertex attributes (to fragment shader)
+out vec3 fragPosition;
+out vec2 fragTexCoord;
+out vec2 fragTexCoord2;
+out vec4 fragColor;
+
+void main() {
+    // Send vertex attributes to fragment shader
+    fragPosition = vec3( matModel * vec4( vertexPosition, 1.0 ) );
+    fragTexCoord = vertexTexCoord;
+    fragTexCoord2 = vertexTexCoord2;
+    fragColor = vertexColor;
+
+    // Calculate final vertex position
+    gl_Position = mvp * vec4( vertexPosition, 1.0 );
+}