programming 3d graphics with opengl

... INTRODUCING OPENGL ES CHAPTER 7 Table 7.2: Library naming scheme. Library content Name of the link library OpenGL ES 1.x with EGL (Common Profile) libGLES_CM.{lib,dll,a,so} OpenGL ES 1.x with EGL ... replicated graphics unit, and in such a case you should call glGetError repeatedly until it returns GL_NO_ERROR. However, OpenGL ES implementations typically have only one graphics unit. It is a good programming ... application. With the exception of display lists these features are not wi dely used even in desktop OpenGL. OpenGL ES 1.0 supports only queries for static state whose values are defined when an OpenGL

Ngày tải lên: 03/07/2014, 11:20

... either with or without antialiasing (enabled and dis- abled with GL_POINT_SMOOTH). With antialiasing off, the points are drawn as squares and the point size is rounded to the closest integer. With ... glLineWidth{fx}(GLfloat width), and the lines can be drawn either with or without antialiasing (enabled and disabled with GL_LINE_SMOOTH). The desktop OpenGL also supports stippling, that is, dotting and ... API, in practice most implementations of OpenGL ES in the market have some issues with either the point clipping when the viewport has been extended, or with point sprites in general. Lines There

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... colors and materials in OpenGL ES is simplified from that of desktop OpenGL The second color model, indexed colors, was considered to be a relic not very compatible with modern 3D graphics, and was ... in OpenGL ES While desktop OpenGL supports creation of texture coordinates, for example so that they come from the vertex locations in eye coordinates, or that they are set up for reflections, OpenGL ... mode is turned on with glMatrixMode( GL_TEXTURE ), but as every texture unit has its own matrix, the active unit must first be specified with void glActiveTexture(GLenumtexture) with texture being

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... glBindTexture(GL_TEXTURE_2D,GLuinttexture) where texture is the name of the texture object In desktop OpenGL other targets, such as 1D and 3D textures are possible, but OpenGL ES only supports two-dimensional textures Trang 4When a ... internalformat must be compatible with the color buffer format according to Table 9.3 Note, however, that glCopyTexImage2D has to flush the graphics pipeline and com-plete all previous graphics calls, so calling ... which face should be culled by calling void glCullFace(GLenummode) Trang 3OPENGL ES RASTERIZATION AND FRAGMENT PROCESSINGwith either GL_FRONT, GL_BACK, or GL_FRONT_AND_BACK as the argument The

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... they are set with glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_X_MIPMAP_Y ); where you replace X and Y with either NEAREST or LINEAR Specifying X to be NEARESTmeans that within one ... chapter, for texture coordinates the active texture unit is selected with glClientActiveTexture, after which the coordinates are specified with glTexCoordPointer The output of one texturing unit cascades ... usual OpenGL convention Note also that you have to enable the texture coordinate interpolation separately for each texturing unit To disable the interpolation of a unit simply call the function with

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... GL_TRUE, GL_TRUE ); draw_scene_with_normal_light(); 218 OPENGL ES RASTERIZATION AND FRAGMENT PROCESSING CHAPTER 9 9.5.4 DEPTH TESTING Depth testing is the final test in the OpenGL ES fragment pipeline. ... component with respect to the reference value (GL_LESS, GL_LEQUAL, GL_GREATER, GL_GEQUAL, GL_EQUAL,orGL_NOTEQUAL). 9.5.1 SCISSORING The scissor test, if enabled, allows only pixels within the ... areas, include many a dvanced algorithms, such as drawing line drawings with hidden lines removed, drawing arbitrary polygons with holes and indentations, and creating volumetric lighting effects

Ngày tải lên: 03/07/2014, 11:20

... or dimensions of the scissor rectangle Trang 3With the exception of the error state, OpenGL ES 1.0 does not support querying anyof the dynamic state OpenGL ES 1.1, on the other hand, has wide support ... GL_VERSION “OpenGL ES-XX Y.Z” where XX = CM for Common Profile, XX = CL for Common Lite Profile, Y is the major version, Z is the minor version For OpenGL ES Common Profile version 1.0 the string is “OpenGL ... GL_DEPTH_BUFFER_BIT, and GL_STENCIL_BUFFER_BIT The value that the buffer is filled with during the clear-ing is set with the followclear-ing functions: void glClearColor{fx}(T red, T green, T blue,

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... their windowing with OpenGL ES Luckily most platforms that have adop-ted OpenGL ES have also chosen to support EGL This is good news for application portability This chapter begins with an example ... Trang 110.4 EXTENSIONSOpenGL ES inherits the extension mechanism of the desktop OpenGL Any vendor can create their own extensions to the basic behavior Additionally, the OpenGL ES specifica-tion ... surface types supported by EGL, and the OpenGL ES/EGL context We cover EGL extensions and describe how the surfaces can be used to mix OpenGL ES and other graphics library calls We also cover additions

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... first render a 3D scene with OpenGL ES and then render some 2D overlay information to the same surface with OpenVG. Also, as the OpenGL ES 2.0 API is completely separate from OpenGL ES 1.x, it is ... share_context shares data with, unless share_context is set to EGL_NO_CONTEXT. With OpenGL ES 1.0 and EGL 1.0 only tex- ture objects could be shared across contexts. With OpenGL ES 1.1 and EGL 1.1 ... that is compatible with config and dpy. This context can then be made cur rent with a compatible rendering surface. The context shares all the shareable data with share_context and with the contexts

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... not fully contained in a server-side object. 11.8 MIXING OPENGL ES AND 2D RENDERING There are several ways to tie in the 3D frame buffer with the 2D native windowing system. The actual implementation ... create an OpenGL ES texture map from that bitmap, and finally render the texture into the OpenGL ES back buffer using a pair of triangles. A call to eglSwapBuffers transfers all the graphics to ... SURFACES AND BITMAPS The second approach is to render with OpenGL ES into a hardware-accelerated pbuffer surface. Whenever there is a switch from 2D to 3D rendering, texture uploading is used as in the

Ngày tải lên: 03/07/2014, 11:20

... non–3D-related code 12.1 OVERVIEW The Mobile 3D Graphics API provides Java programmers with an efficient and compact interface for managing and rendering 3D scenes It is based on the established OpenGL ... started with programming on M3G Our presentation is aligned with Part I of this book, and builds on concepts introduced there In other words, we assume that you are familiar with the OpenGL (ES) ... the test run (%) F i g u r e 11.2: Duration with frame rate capped to 15 FPS but with different features enabled. 2 = textured and lit, 3 = textured with mipmaps and lit, 4 = nontextured and lit,

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... Mobile 3D Graphics with OpenGL ES and M3G This page intentionally left blank Mobile 3D Graphics with OpenGL ES and M3G Kari Pulli Tomi Aarnio Ville Miettinen ... Profiles and Versions OpenGL ES 1.0 in a Nutshell New Features in OpenGL ES 1.1 Extension Mechanism OpenGL ES Extension Pack Utility APIs Conventions Hello, OpenGL ES! CHAPTER OPENGL ES TRANSFORMATION ... Fighting the Fragmentation Design Principles OpenGL ES M3G Related Standards 12 14 18 19 21 ANATOMY OF A GRAPHICS ENGINE CHAPTER LINEAR ALGEBRA FOR 3D GRAPHICS 27 2.1 27 Coordinate Systems 2.1.1...

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... texels, which is quite a lot for software engines without dedicated texture units, so the mobile 3D APIs allow approximating full trilinear filtering with a bilinear filtering at the closest mipmap ... Multitexturing A 3D engine may have several texturing units, each with its own texture data format, function, matrix, and so on By default, the input fragment color is successively combined with each ... somewhat distorted a volume However, 3D texture data requires a lot of memory at runtime, more than is usually available on mobile devices, and thus the mobile 3D APIs only support 2D texture maps...

Ngày tải lên: 03/07/2014, 11:20