multiTexture3dExample

Learning Objectives

This example demonstrates how to use multiple textures in a shader. The vertex shader will use a displacement map texture to determine the amount to 'push out' the vertices of the mesh. The frag shader will apply lighting based on a normal map, diffuse texture and ambient occlusion texture using 2 lights. A fbo will be used to determine how much the textures should influence the sphere. By default the sphere has a slight phong shading with a solid color.

You will learn how to..

• load textures from a directory
• configure textures for mapping to a sphere
• use a vertex shader to displace vertices based on a texture map
• write a single fragment shader that processes all of the textures and applies lighting
• draw into a fbo using the mouse position

Pay attention to..

• the TexturePack class in ofApp.h
• the material and textures sent to the shader
• fbo being drawn into using a brush image

Expected Behavior

When launching this app, you should see a single sphere and a grid plane on a dark background.

Instructions for use:

• Press and hold spacebar to draw into the fbo to increase texture influence.
• Press d to toggle debug
• Press up and down to cycle through the 3 texture packs

Other classes used in this file

This Example uses the following classes:

• ofShader
• ofFbo
• ofMesh
• ofFbo
• ofLight
• ofMaterial
• ofTexture