WoW骨骼動畫的GLSL實現

使用指令將頂點的骨骼和權重資訊作為generic attribute屬性傳入給shader物件.

glint indexbone = glgetattriblocationarb(m_glprograme, "bone");

glint indexweight = glgetattriblocationarb(m_glprograme, "weight");

glvertexattribpointerarb(indexbone, 4, gl_unsigned_byte, gl_false, sizeof(mdl_vertex), m_arrmdlvertices[0].bones);

glvertexattribpointerarb(indexweight, 4, gl_unsigned_byte, gl_false, sizeof(mdl_vertex), m_arrmdlvertices[0].weights);

glenablevertexattribarrayarb(indexbone);

glenablevertexattribarrayarb(indexweight);

在每幀在cpu中計算骨骼矩陣,並將計算好的骨骼矩陣陣列傳入shader物件.

glint indexbonematrices = glgetuniformlocationarb(m_model.m_glprograme, "bonematrices");

for(unsigned int i = 0; i < m_animskeleton.m_vecbones.size(); i++)

搞定,執行,發現wow的獸人模型竟然有128個骨骼,而n6200的shader的uniform matrix引數最多隻給60個,還得考慮低端機器,玻璃渣是怎麼做的?發現dx的實現從來就是送入硬體處理的,節省了額外的頂點記憶體,加快了速度,確實是不二的選擇.

attribute vec4 bone;

attribute vec4 weight;

uniform mat4 bonematrices[

60 ];

const

float

fw =

1.0/

255.0

; void

main()

else

break

;gl_position

=gl_modelviewprojectionmatrix

*blendvertex;

gl_texcoord[0]

=gl_texturematrix[0]

*gl_multitexcoord0;

gl_frontcolor

=gl_color;

}