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详细说明： Particle System API by David McAllister version 1.11 February 2, 1999 (Groundhog Day) http://www.cs.unc.edu/~davemc/Particle Running the PSpray Demo To run the PSpray demo, click on pspray.exe and the demo will start by drawing a fountain. It uses motion blur, which may be faster or slower than no motion blur. To toggle it, press 'm'. Press the right mouse button to see a menu of options. Many different particle effects are included in the demo. The menu tells what they are. Press the space bar to cause an explosion. Press 'f' to toggle full screen mode. By default, the program runs a maximum of 10000 particles. Use '+' and '-' to change the number of particles. I have a 400 MHz Pentium ][ and it can run at about 20 frames per second with 10000 particles. That's using an Evans & Sutherland RealImage1000 graphics card, which doesn't have a geometry accelerator. If you have a geometry accelerator, I bet you could do twice as many particles because the particle system code does less work per particle than OpenGL does. This demo shows just particles by themselves, instead of as a special effect in an environment, but these effects can trivially be added to any OpenGL program. Compiling the Library for UNIX The sample Makefile compiles both libparticle.a and pspray. If the supplied optimization flags don't make sense, feel free to rip them out. I've also included an SGI N32 compiled library and application. Compiling the Library for Evil Windows The particle library, particle.lib, comes precompiled in release mode. If you want to recompile the library (to modify it, say), create a new Win32 Static Library project called Particle in Visual Studio and add all the .cpp and .h files to the project, except pspray.cpp. Then just compile it. I've included particle.dsp, which is a sample project file. You can try just adding it to your workspace instead of making a new project. Compiling the Demo for Evil Windows Make a new Win32 Console Application project called PSpray. Make it depend on the project Particle. Add pspray.cpp to the project. In the C++ setting, add the particle system library folder to the include path, and GLUT if necessary. Then in Link settings, add particle.lib, glut32.lib, glu32.lib, and opengl32.lib. Or you can alternatively use the SGI libraries (same names but without the 32). That's really it. If you have any questions, comments, or suggestions you can mail me at davemc@cs.unc.edu Changes in Version 1.11 Fixed amount of bouncing to be independent of area of triangle or plane. I had forgotten to normalize the plane normal. Oops. ...展开收缩
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