=========================================================================== IShadowMap-1.2 http://www.daionet.gr.jp/~masa/ishadowmap 2000.09 Masa (Masaki Kawase) E-Mail: masa@daionet.gr.jp URL : http://www.daionet.gr.jp/~masa/ =========================================================================== ======== Contents ======== - What is IShadowMap? - System Requirements - Installation - Techniques - History ======== What is IShadowMap? ======== IShadowMap is a OpenGL Shadow Mapping demo including - Atmospheric Effect - Reflection - Fresnel Effect - Gloss Mapping etc. ======== System Requirements ======== - Intel 80x86 compatible CPU - Microsoft Windows 95/98/NT/2000 - OpenGL-1.1 or later that supports GL_ARB_multitexture or GL_EXT_multitexture or GL_SGIS_multitexture are required to execute. Additionally, - at least 4 bits alpha plane - GL_EXT_texture_env_combine are required to enable shadow and gloss mapping effects. This demo program is optimized for nVIDIA GeForce series. It works on Riva TNT based video cards too, but has some bugs with positional lights. On GeForce based video cards, reference driver 5.x or later is highly recommended. And on TNT based video cards, 6.x or later is recommended. Otherwise, it will work very slowly :-( ======== Installation ======== Extract all files to the folder that you want to install. Execute "ishadowmap.exe". Press 'h' key to display the help information. ======== Techniques ======== This demo's shadow mapping uses unique index number of each convex object instead of depth value from the light. Therefore, shadowing uses only one texture blending stage and 4 bits alpha plane. ======== History ======== - 2000.09.09 IShadowMap-1.2 Release - Supprting anisotropic filtering If GL_EXT_texture_filter_anisotropic extension is supported, max degree of anisotropy is set to 2.0 by default and you can increase/decrease the max degree of anisotropy by pushing 'u'/'U'. Especially the floor texture looks better. - 2000.09.04 IShadowMap-1.1 Release - Supprting nVIDIA Riva TNT series (works fine only with directional lights) - Changing some textures, etc. - 2000.08.30 IShadowMap-1.0 Release