Mali GPU User Interface Engine Application Development Guide

Tutorial on Drawing 3D Shapesvec3 camPos = calculateCamPos(4.0f, cameraAngle);vec3 camTarget = vec3(0.0f, 0.0f, 0.0f);vec3 upVector = vec3(0.0f, 1.0f, 0.0f);// Set up the view and projection matrices and multiply them to get the// modelviewprojection matrix.mat4 proj = mat4::perspective(35.0f, 1.0f, 0.1f, 100.0f);mat4 view = mat4::lookAt(camPos, camTarget, upVector);mat4 world = mat4::identity();mat4 wvpMatrix = proj * view * world;// Set the program to use and initialize the uniformscontext->setProgram(texturingProgram);context->setUniformSampler("texture", static_cast(texture));glEnable(GL_DEPTH_TEST);...6. Example 4-12 shows the draw loop which reacts to keyboard input to change the cameraand view:Example 4-12 Reacting to keyboard input to change the view...do{// Exit the applicationif (keyboard->getSpecialKeyState(Keyboard::KEY_ESCAPE)){return 0;}// Rotate object or cameraif (keyboard->getSpecialKeyState(Keyboard::KEY_SPACE)){if (keyboard->getSpecialKeyState(Keyboard::KEY_LEFT)){camPos = calculateCamPos(4.0f, ++cameraAngle);view = mat4::lookAt(camPos, camTarget, upVector);}if (keyboard->getSpecialKeyState(Keyboard::KEY_RIGHT)){camPos = calculateCamPos(4.0f, --cameraAngle);view = mat4::lookAt(camPos, camTarget, upVector);}}else{if (keyboard->getSpecialKeyState(Keyboard::KEY_RIGHT)){world *= mat4::rotation(1.0f, vec3(0.0f, 1.0f, 0.0f));}if (keyboard->getSpecialKeyState(Keyboard::KEY_LEFT)){world *= mat4::rotation(-1.0f, vec3(0.0f, 1.0f, 0.0f));}}wvpMatrix = proj * view * world;ARM DUI 0527A-02a Copyright © 2010 ARM. All rights reserved. 4-10ID070710Non-Confidential - Draft - Beta