GL11.glEnableClientState(GL11.GL_TEXTURE_COORD_ARRAY);
// initParams(); //done by initGL
initShaders();
renderTerrain.Initialize();
renderingContext = new RenderingContext(null,
shaderProgram, projectionMatrixUniform,
textureUniform, uAmbientColorUniform,
uLightingDirectionUniform, uDirectionalColorUniform,
uUseLightingUniform, normalMatrixUniform,
vertexPositionAttribute, textureCoordAttribute,