unit_genshadow.vp

这是整套横扫千军3D版游戏的源码

!!ARBvp1.0
# vertex program for generating the shadow buffer

ATTRIB pos = vertex.position;
PARAM mat[4] = { state.matrix.projection };
PARAM mat2[4] = { state.matrix.modelview };
OUTPUT opos = result.position;
TEMP temp,temp2;

DP4 temp.x, pos, mat2[0];
DP4 temp.y, pos, mat2[1];

ABS temp2,temp;
ADD temp2,temp2,program.env[17];
RSQ temp2.x, temp2.x;
RSQ temp2.y, temp2.y;
ADD temp2,temp2,program.env[18];
MAD temp, temp, temp2,program.env[16];

DP4 temp.z, pos, mat2[2];
DP4 temp.w, pos, mat2[3];

DP4 opos.x, temp, mat[0];
DP4 opos.y, temp, mat[1];
DP4 opos.z, temp, mat[2];
DP4 opos.w, temp, mat[3];

#need texture coord for alpha testing (to shadow masked texels correctly)
MOV result.texcoord[0], vertex.texcoord[0];

END