Mali GPU User Interface Engine Application Development Guide

Tutorial on Drawing 3D Shapes4.3 Texturing the cube facesThis tutorial combines:• drawing a 3D cube• texturing each 2D face of the cube• reacting to keyboard input to rotate the cube or move the camera.1. Locate the shader example 03 - Texturing and open the texturing.cpp file2. Example 4-8 shows the standard initialization code and loading the shaders:Example 4-8 Initalization for the textured cube...#include using namespace MDE;static const float PI = 3.14159265;inline vec3 calculateCamPos(float radius, float angle){float angleRad = angle / 180 * PI;return vec3(radius * cos(angleRad), 2.0f, radius * sin(angleRad));}int main(int argc, char * argv[]){try{Managed 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(".");...Proxy proxy(filesystem, context);Program *texturingProgram =proxy.getProgram("shaders/texturing.vert;shaders/texturing.frag");Texture2D *texture = proxy.getTexture2D("data/rock_t.png");texture->setFilterMode(GL_NEAREST, GL_NEAREST);3. Example 4-9 shows how to set the locations for the cube vertices and the correspondinglocations in the texture bitmap.Example 4-9 vertexData for the textured cube...GLfloat vertexData[] = {// FRONT-0.5f, -0.5f, 0.5f, 0.0f, 0.0f, //xyz for vertices, uv for texture0.5f, -0.5f, 0.5f, 1.0f, 0.0f,-0.5f, 0.5f, 0.5f, 0.0f, 1.0f,0.5f, 0.5f, 0.5f, 1.0f, 1.0f,// BACK-0.5f, -0.5f, -0.5f, 0.0f, 0.0f,-0.5f, 0.5f, -0.5f, 1.0f, 0.0f,0.5f, -0.5f, -0.5f, 0.0f, 1.0f,ARM DUI 0527A-02a Copyright © 2010 ARM. All rights reserved. 4-8ID070710Non-Confidential - Draft - Beta