Add support for textures

app/src/main/resources/shaders/default.fs

@@ -1,10 +1,21 @@
 #version 330
 
 uniform vec4 objectColor;
+uniform int hasTexture;
+uniform sampler2D sampler;
+
+in vec2 fragmentTexCoord;
 
 out vec4 fragColor;
 
 void main()
 {
-   fragColor = objectColor;
+   if(hasTexture == 1)
+   {
+      fragColor = objectColor * texture(sampler, fragmentTexCoord);
+   }
+   else
+   {
+      fragColor = objectColor;
+   }
 }

app/src/main/resources/shaders/default.vs

@@ -4,9 +4,13 @@ uniform mat4 modelMatrix;
 uniform mat4 viewMatrix;
 uniform mat4 projectionMatrix;
 
-layout(location=0) in vec3 position;
+layout(location=0) in vec2 position;
+layout(location=1) in vec2 texCoord;
+
+out vec2 fragmentTexCoord;
 
 void main()
 {
-   gl_Position = projectionMatrix * viewMatrix * modelMatrix * vec4(position, 1.0);
+   gl_Position = projectionMatrix * viewMatrix * modelMatrix * vec4(position, 0.0, 1.0);
+   fragmentTexCoord = texCoord;
 }