Mali GPU User Interface Engine Application Development Guide

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Tutorial on Drawing 3D Shapes...}// calculate new camera positioncamPos = calculateCamPos(75.0f, --cameraAngle);// create a view based on the new camera positionview = mat4::lookAt(camPos, camTarget, upVector);}if (keyboard->getSpecialKeyState(Keyboard::KEY_RIGHT)){camPos = calculateCamPos(75.0f, ++cameraAngle);view = mat4::lookAt(camPos, camTarget, upVector);}}else{if (keyboard->getSpecialKeyState(Keyboard::KEY_RIGHT)){// create a world matrix to rotate the teapotworld *= mat4::rotation(1.0f, vec3(0.0f, 0.0f, 1.0f));}if (keyboard->getSpecialKeyState(Keyboard::KEY_LEFT)){world *= mat4::rotation(-1.0f, vec3(0.0f, 0.0f, 1.0f));}7. Example 4-26 shows the part of the draw loop that sets the uniform values and draws theteapot:Example 4-26 Drawing the teapot with lighting...wvpMatrix = proj * view * world;// Have to set the uniforms each frame since the above call to setProgram// clears them.context->setUniformMatrix("WORLD_VIEW_PROJECTION", wvpMatrix);context->setUniformMatrix("WORLD", world.toMat3());context->setUniform("LIGHT_POSITION", lightPosition);context->setUniform("CAMERA_POSITION", camPos);context->setUniform("AMBIENT_LIGHT", AMBIENT_LIGHT);context->setUniform("DIFFUSE_LIGHT", DIFFUSE_LIGHT);context->setUniform("SPECULAR_LIGHT", SPECULAR_LIGHT);context->setUniform("COLOR", ::COLOR);// Clear the screen and draw teapot with lightingglClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT );}teapot->draw();}while ( context->update() );}catch (Exception &e){printf(e.getMessage().getCharString());}8. Rebuild the project and run it. Figure 4-5 on page 4-21 shows the shape:ARM DUI 0527A-02a Copyright © 2010 ARM. All rights reserved. 4-20ID070710Non-Confidential - Draft - Beta
Tutorial on Drawing 3D ShapesFigure 4-5 The teapot shape with lighting effects9. Use the keyboard to change the view:• press the left or right arrows to rotate the teapot• depress the spacebar and then press the left or right arrows to move the camera• press the up arrow to change between Gouraud and Phong lighting.4.4.1 Replacing the teapot with a cubeThe advantage of using an asset in <strong>Mali</strong> Binary Asset format is that you can quickly load a newshape:1. Example 4-23 on page 4-18 showed how to load the teapot asset file. Copy the cube.mba,rock_n.png, and rock_t.png files from bumpmapping\data to the lighting\data area.The rock_n.png, and rock_t.png files are not used in this example, but they are referencedby the cube.mba file so they must also be copied.2. Modify the getSceneAsset() call to load the cube asset as shown in Example 4-27:Example 4-27 Load the asset for the teapot.........// Loading scene// SceneAsset* scene = proxy.getSceneAsset("teapot.mba");SceneAsset* scene = proxy.getSceneAsset("cube.mba");GeometryAsset* teapot = static_cast(scene->getAsset(Asset::TYPE_GEOMETRY, 0));teapot->draw();3. Rebuild the project and run it. Figure 4-6 on page 4-22 now shows a cube shape insteadof a teapot:ARM DUI 0527A-02a Copyright © 2010 ARM. All rights reserved. 4-21ID070710Non-Confidential - Draft - Beta
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MaliGPU User Interface EngineVersio
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ContentsMali GPU User Interface Eng
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List of TablesMali GPU User Interfa
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List of FiguresFigure 4-17 Environm
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PrefaceAbout this bookThis is the M
Page 11 and 12: PrefaceFeedbackARM welcomes feedbac
Page 13 and 14: Introduction1.1 About the Mali GPU
Page 15 and 16: IntroductionProxygetLoader()LoaderA
Page 17 and 18: Chapter 2Tutorial on the System Cla
Page 19 and 20: Tutorial on the System Classes2.2 C
Page 21 and 22: Tutorial on the System ClassesFigur
Page 23 and 24: Tutorial on the System ClassesDrawi
Page 29 and 30: Chapter 3Tutorial on Drawing 2D Sha
Page 31 and 32: Tutorial on Drawing 2D Shapes...con
Page 33 and 34: Tutorial on Drawing 2D ShapesFor ea
Page 36 and 37: Tutorial on Drawing 2D ShapesExampl
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Page 44 and 45: Tutorial on Drawing 3D Shapes4.1 Dr
Page 48 and 49: Tutorial on Drawing 3D Shapes4.2 Co
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Page 52 and 53: Tutorial on Drawing 3D Shapesvec3 c
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Tutorial on the Lotion User Interfa
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Chapter 6Tutorial on Constructing C
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Tutorial on Constructing Custom Sha
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Appendix AMatrix and Vector Operati
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Matrix and Vector Operationsmat4 pe
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GlossaryThis glossary describes som
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GlossaryShader LibraryVertex shader
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Mali GPU User Interface Engine Application Development Guide

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