Mali GPU User Interface Engine Application Development Guide

Tutorial on Drawing 3D Shapes...}if(targetNode)camTarget = targetNode->getAbsolutePosition();// Get camera FOVAttribute* fovAttribute = camNode->getCamera(0)->getAttribute("xfov");if(fovAttribute && fovAttribute->getComponentCount() == 1)fovAttribute->getValue(time, &camFov);// Get camera aspectAttribute* aspectAttribute = camNode->getCamera(0)->getAttribute("aspect");if(aspectAttribute && aspectAttribute->getComponentCount() == 1)aspectAttribute->getValue(time, &camAspect);context->setUniform("CAMERA_POSITION", 3, 1, camPos);// Terminate on pressing key ESCAPEif(keyboard->getSpecialKeyState(Keyboard::KEY_ESCAPE))break;5. Example 4-56 shows the part of the draw loop that modifies the lighting:Example 4-56 Modifying the lighting...// For each lightfor(int i = 0; i < 3; i++){LightAsset* light = (LightAsset*)scene->getAsset(Asset::TYPE_LIGHT, i);if (light){Array nodes;scene->findAssetNodes(light, scene->getTree(0), nodes);NodeAsset* lightNode = nodes[0]->data;if (lightNode){vec3 lightPos = lightNode->getAbsolutePosition();char buffer[255];// Get and set attributes for light:for(unsigned int j = 0; j < light->getAttributeCount(); j++){// Check for the color attributeAttribute* attr = light->getAttribute(j);if(attr->name == "color"){float values[3];attr->getValue(time, values);sprintf(buffer, "LIGHT_COLOR[%i]", i);context->setUniform(buffer, 3, 1, values);}// Check for the far attenuation start attributeelse if(attr->name == "far_attenuation_start"){float value;attr->getValue(time, &value);sprintf(buffer, "LIGHT_FAR_ATTENUATION_START[%i]", i);context->setUniform(buffer, value);}// Check for the fat attenuation end attributeARM DUI 0527A-02a Copyright © 2010 ARM. All rights reserved. 4-44ID070710Non-Confidential - Draft - Beta