OpenGL ES for iOS (3D Graphics)
- 1. 3D Graphics
- 2. Robert Altman Software Entrepreneur Altman Software Design, LLC Lead iOS Developer, Telvent DTN [email protected] @mStyle www.inquinity.com
- 4. OpenGL Hardware optimized 3D rendering engine OpenGL ES (Mobile) and OpenGL (Desktop) OpenGL ES 1.0 == OpenGL 1.3 -- Fixed function (integer) OpenGL ES 1.1 == OpenGL 1.5 -- Fixed function OpenGL ES 2.0 == OpenGL 2.0 -- Programmable pipeline
- 5. Open GL
- 6. Open GL ES
- 7. 3D Data Operation Vertices Translation Surfaces Rotation Surface Normals Scaling Vertex Normals Lighting Materials Shading
- 8. Polygons OpenGL supports Triangles and Quads OpenGL ES supports Triangles Remember this...
- 10. iOS and OpenGL OpenGL ES 1.1 supported everywhere OpenGL ES 2.0 supported starting with iPhone 3GS (2009) EAGLView and Xcode template Demo Performance Tools Apple sample (there is a template!)
- 11. 3D Modeling Modeling and Animation Plethora of formats (Wavefront OBJ, POD, Collada, Maya) Applications: Commercial, or blender Thriving marketplaces for models
- 12. blender Front View Numpad-1 Back View Control-Numpad-1 Left Side View Numpad-3 Right Side View Control-Numpad-3 Top View Numpad-7 Bottom View Control-Numpad-7 Rotate Model Numpad-2, 4, 6, 8 Move Model Control-Numpad-2, 4, 6, 8 Zoom Model Numpad-Plus and Numpad-Minus Toggle Perspective/Orthogonal Numpad-5 Toggle Model/Camera View Numpad-0
- 13. blender !! User preference to “Emulate 3-button mouse” RMB = Two-finger click on track pad Fine control is difficult with mouse or trackpad Multi-touch Trackpad Rotate Model Two finger rotate Move Model Two finger drag Zoom Model Two finger pinch
- 14. blender Demo
- 15. 3D File Formats Wavefront OBJ Collada POD ... Many others! C/C++ header file What will your app support?
- 17. 3D Icon Prepare model in blender Export to PNG Photoshop iOS icon template (pixelresort) Export multiple sizes of image
- 18. iPad Application Demo
- 19. Resources ManiacDev StackOverflow Jeff LaMarch NeHe Productions Nate Robins “tutors” Any good gaming development site Phillip Rideout Book
- 20. OpenGL ES for iOS Robert Altman Software Entrepreneur Altman Software Design, LLC Lead iOS Developer, Telvent DTN [email protected] @mStyle www.inquinity.com Resources, presentation, and other links will be posted on blog
Editor's Notes
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- #5: 1. OpenGL: hardware optimized display layer\n2. Desktop vs. Mobile\n3. Different generations\n4. Fixed function simpler\n5. Programmable more powerful\n6. Security Questions: Graphics a the new viruses.\n\n
- #6: OpenGL on desktop platforms\n
- #7: OpenGL ES on mobile platforms\n\nSubset of OpenGL\n\nPhone7 supports Direct3D\n
- #8: Surfaces are defined by vertices\nSurface normals define which way a surface is facing\nSpecialized structure allow re-use of vertices to minimize data size\nTextures are samples of material which are applied to surfaces\n\nMain operations: Translation, Rotation, Scaling.\nLighting: sources, position, intensity, color, type\n\n
- #9: Surfaces are defined by vertices\nSurface normals define which way a surface is facing\nSpecialized structure allow re-use of vertices to minimize data size\nTextures are samples of material which are applied to surfaces\n\nMain operations: Translation, Rotation, Scaling.\nLighting: sources, position, intensity, color, type\n\n
- #10: Demo apps\nWritten by Nate Robins, http://user.xmission.com/~nate/tutors.html\nOld Projects\nSource in C (Visual Studio 6, Visual Studio.NET, OS/X (PowerPC)\n
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- #17: 1. UI operation\n2. Select objects\n3. Object grouping\n4. Window split/merge\n\n
- #18: Wavefront OBJ is very common\nCollada is one of many interchange formats\nPOD = Plain Old Data\n\nConversion scripts\nImport from \n
- #19: camera.mtl\ncamera.obj\n\ncamera.h\n\nobj2opengl\nCollada2POD\nCollada2PODGUI\n
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- #22: Demo App\n
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