Mali GPU User Interface Engine Application Development Guide

Tutorial on Drawing 3D Shapes4.5 Bump mapping on the cubeThis tutorial combines:• using a geometry asset, in this example it is a cube• bump mapping• reacting to keyboard input to rotate the cube or move the camera.1. Locate the shader example 05 - BumpMapping and open the bumpmapping.cpp file.2. Example 4-33 shows the standard initialization code:Example 4-33 Initialization for the Bump Mapping application...##include using namespace MDE;const float AMBIENT = 0.2;const float DIFFUSE_CONTRIBUTION = 0.7;const float SPECULAR_CONTRIBUTION = 0.4;static const vec3 AMBIENT_LIGHT = vec3 (0.2f, 0.2f, 0.2f);static const vec3 DIFFUSE_LIGHT = vec3(0.7f, 0.7f, 0.7f);static const vec3 SPECULAR_LIGHT = vec3(0.4f, 0.4f, 0.4f);static const float PI = 3.14159265;/*** Function that calculates the camera position given an angle and a radius. This function* enables the camera to rotate around the scene object.*/inline vec3 calculateCamPos(float radius, float angle){float angleRad = angle / 180 * PI;return vec3(radius * cos(angleRad), radius * sin(angleRad), 0.0f);}int main(int argc, char * argv[]){try{// Initialize the demo engine classesManaged system = create_system_backend();Managed context = system->createContext(320, 240);#ifdef MDE_OS_PC_LINUXManaged keyboard = system->createKeyboard(context);#elseManaged keyboard = system->createKeyboard();#endifManaged filesystem = system->createFileSystem("./data");Managed timer = system->createTimer();Proxy proxy(filesystem, context);// Loading programsProgram* perVertexLightingProgram =proxy.getProgram("../shaders/bumpmapping.vert;../shaders/bumpmapping.frag");...3. Previous examples specified the locations for each vertex. Example 4-34 on page 4-26shows how to load an asset file that contains the information:ARM DUI 0527A-02a Copyright © 2010 ARM. All rights reserved. 4-25ID070710Non-Confidential - Draft - Beta