ËÅѧ¨Ò¡¹Ñé¹¹Ùèä´éàʹÍàÃ×èͧ ¡ÒÃŧ texture ã¹Ãкº GL áÅéǹШêÐ
·Õè¹ÕéàÃÒ¡çµéͧÁÒ¡Ó˹´ÇèÒ¨ÐãÊèŧä»ÍÂèÒ§äÃä´éºéÒ§ (parameters)
«Ö觨еéͧ¡Ó˹´¡è͹·Õè¨Ð up texture ŧä»
àÃÒÊÒÁÒö¡Ó˹´ä´é´éÇ¡ÒÃãªé¤ÓÊÑè§
glParameter [i, f, iv, fv] ( TEX_TYPE, MODE, VALUE )
* TEX_TYPE ¡ç¨ÐÁÕãËéàÅ×Í¡ä´éµÍ¹ upload GL_TEXTURE_1D, GL_TEXTURE_2D, GL_TEXTURE_3D (
GL_TEXTURE_RECTANGLE_EXT, GL_TEXTURE_RECTANGLE_ARB,
GL_TEXTURE_CUBE_MAP (ÊÒÁÒöàªçµ¡è͹ä´é áÅéǵéͧ upload ãËé¤Ãº·Ñé§ 6 ´éÒ¹)
µÒÁ´éÒ¹º¹àÅ áÅеéͧµÑé§ãËéàËÁ×͹¡Ñ¹¡Ñº·ÕèàÅ×Í¡äÇé㹵͹áá (ÍÂèÒ¼Ô´)
* MODE à»ç¹ä»ä´éËÅÒÂẺ áÅеÒÁ´éÇ VALUE ·ÕèÁÕãËéàÅ×͡੾ÒÐà·èÒ¹Ñé¹
- GL_TEXTURE_MIN_FILTER «Öè§à»ç¹¡ÒáÓ˹´ filter àÇÅÒ texture ÍÂÙèã¡Åéæ
- GL_TEXTURE_MAX_FILTER «Öè§à»ç¹¡ÒáÓ˹´ filter àÇÅÒ texture ÍÂÙèä¡Åæ
GL_NEAREST äÁèà©ÅÕèÂÊÕ
GL_LINEAR à©ÅÕèÂÊÕ
GL_NEAREST_MIPMAP_NEAREST äÁèà©ÅÕèÂÊÕáÅÐ ÊÃéÒ§ MIPMAP ẺäÁèà©ÅÕèÂÊÕ
GL_NEAREST_MIPMAP_LINEAR äÁèà©ÅÕèÂÊÕáÅÐ ÊÃéÒ§ MIPMAP Ẻà©ÅÕè¹ÊÕ
GL_LINEAR_MIPMAP_NEAREST à©ÅÕèÂÊÕ áµèÊÃéÒ§ MIPMAP ẺäÁèà©ÅÕèÂÊÕ
GL_LINEAR_MIPMAP_NEAREST à©ÅÕèÂÊÕ áµèÊÃéÒ§ MIPMAP Ẻà©ÅÕèÂÊÕ
-GL_TEXTURE_WARP_S à»ç¹¡Òú͡ ¤Ø³ÊÁºÑµÔ¡ÒëéÓÀÒ¾ã¹á¡¹ á¹Ç¹Í¹
-GL_TEXTURE_WARP_T à»ç¹¡Òú͡ ¤Ø³ÊÁºÑµÔ¡ÒëéÓÀÒ¾ã¹á¡¹ á¹ÇµÑé§
-GL_TEXTURE_WARP_S à»ç¹¡Òú͡ ¤Ø³ÊÁºÑµÔ¡ÒëéÓÀÒ¾ã¹á¡¹ ÅÖ¡ (GL_TEXTURE_3D, GL_TEXTURE_CUBE_MAP)
GL_CLAMP äÁè«éÓ
GL_REPEAT «éÓ
GL_CLAMP_TO_BORDER_ARB äÁè«éÓ áµè¶éÒà¡Ô¹¨ÐàÍÒÊբͺÁÒ´éÇ (µéͧãªé GL_ARB_texture_border_clamp)
GL_MIRRORED_REPEAT_ARB «éÓáÅéǨСÅѺ´éÒ¹ (µéͧãªé GL_ARB_texture_mirrored_repeat)
GL_MIRROR_CLAMP_EXT, GL_MIRROR_CLAMP_TO_EDGE_EXT «éÓáÅéÇ¡ÅѺ´éÒ¹Ãͺà´ÕÂÇ
(µéͧ¡ÒÃãªé GL_ATI_texture_mirror_once ËÃ×Í GL_EXT_texture_mirror_clamp)
ËÁÒÂà˵Ø
OpenGL 1.0 ÁÕ REPEAT & CLAMP
OpenGL 1.2 ÁÕ CLAMP_TO_EDGE
OpenGL 1.3 ÁÕ CLAMP_TO_BORDER
OpenGL 1.4 ÁÕ MIRRORED_REPEAT
ATI_texture_mirror_once ¨ÐÁÕ MIRROR_CLAMP & MIRROR_CLAMP_TO_EDGE
EXT_texture_mirror_clamp ¨ÐÁÕ MIRRO_CLAMP_TO_BORDER
-GL_BORDER_COLOR
ºÍ¡ÊÕ·Õè¨Ðãªé¡Ñº¢Íº µéͧÊè§à»ç¹àÅ¢ 4 ªØ´ ã¹áººÍÒàÃÂì
¡Ó˹´ãËéÊÃéÒ§ MIPMAP Ẻ auto (äÁèµéͧà«çµ¾Ç¡ MIPMAP àŵÒÁ´éÒ¹º¹)
-GENERATE_MIPMAP_SGIS
True, False àÅ×Í¡¶éÒµéͧ¡ÒÃãËé·Ó
¡Ó˹´ Level of Detail (LOD) (µéͧ¡Òà GL_SGIS_texture_lod ËÃ×Í GL_EXT_texture_lod)
-GL_TEXTURE_MIN_LOD_SGIS , GL_TEXTURE_MIN_LOD_EXT
ãËé¤èÒ Level ·ÕèµèÓÊØ´·Õè¨ÐãËé Hardware ·ÓãËé
-GL_TEXTURE_MAX_LOD_SGIS, GL_TEXTURE_MAX_LOD_EXT
ãËé¤èÒ Level ·ÓÊÙ§ÊØ´·Õè¨ÐãËé Hardware ·ÓãËé
-GL_TEXTURE_BASE_LEVEL_SGIS, GL_TEXTURE_BASE_LEVEL_EXT
ãËé¤èÒ Level »¡µÔ·Õè¨ÐãËé Hardware ·ÓãËé
-GL_TEXTURE_MAX_LEVEL_SGIS, GL_TEXTURE_MAX_LEVEL_EXT
ãËé¤èÒ Level ·ÕèÊÙ§·ÕèÊØ´·Õè¨ÐãËé Hardware ·ÓãËéä´é
áÅÐ Anisotropic Filter (GL_EXT_texture_filter_anisotropic)
-GL_TEXTURE_MAX_ANISOTROPY_EXT
ãËé¤èÒ Anisotropic ·Õèµéͧ¡Ò÷Ó