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use projective texturing for blob shadows

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git-svn-id: svn://svn.code.sf.net/p/actiongame/code/trunk/ac@2996 e016b1c5-ed68-44aa-a2f7-31cac88cffde
This commit is contained in:
Lee Salzman
2008-10-13 13:31:33 +00:00
parent 13c7f2129f
commit b1cf271061
4 changed files with 189 additions and 27 deletions
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source/src/rendergl.cpp
+12 -11
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@@ -144,7 +144,7 @@ void enablepolygonoffset(GLenum type)
return;
}
glmatrixf offsetmatrix = projmatrix;
glmatrixf offsetmatrix = reflecting ? clipmatrix : projmatrix;
offsetmatrix[14] += depthoffset * projmatrix[10];
glMatrixMode(GL_PROJECTION);
@@ -163,7 +163,7 @@ void disablepolygonoffset(GLenum type, bool restore)
if(restore)
{
glMatrixMode(GL_PROJECTION);
glLoadMatrixf(projmatrix.v);
glLoadMatrixf(reflecting ? clipmatrix.v : projmatrix.v);
glMatrixMode(GL_MODELVIEW);
}
}
@@ -519,7 +519,9 @@ void transplayer()
glTranslatef(-camera1->o.x, -camera1->o.y, -camera1->o.z);
}
void genclipmatrix(float a, float b, float c, float d, glmatrixf &matrix)
glmatrixf clipmatrix;
void genclipmatrix(float a, float b, float c, float d)
{
// transform the clip plane into camera space
float clip[4];
@@ -529,11 +531,11 @@ void genclipmatrix(float a, float b, float c, float d, glmatrixf &matrix)
y = ((clip[1]<0 ? -1 : (clip[1]>0 ? 1 : 0)) + projmatrix[9]) / projmatrix[5],
w = (1 + projmatrix[10]) / projmatrix[14],
scale = 2 / (x*clip[0] + y*clip[1] - clip[2] + w*clip[3]);
matrix = projmatrix;
matrix[2] = clip[0]*scale;
matrix[6] = clip[1]*scale;
matrix[10] = clip[2]*scale + 1.0f;
matrix[14] = clip[3]*scale;
clipmatrix = projmatrix;
clipmatrix[2] = clip[0]*scale;
clipmatrix[6] = clip[1]*scale;
clipmatrix[10] = clip[2]*scale + 1.0f;
clipmatrix[14] = clip[3]*scale;
}
bool reflecting = false, refracting = false;
@@ -607,11 +609,10 @@ void drawreflection(float hf, int w, int h, float changelod, bool refract)
glScalef(1, 1, -1);
}
glmatrixf clipmat;
genclipmatrix(0, 0, -1, 0.1f*reflectclip+hf, clipmat);
genclipmatrix(0, 0, -1, 0.1f*reflectclip+hf);
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadMatrixf(clipmat.v);
glLoadMatrixf(clipmatrix.v);
glMatrixMode(GL_MODELVIEW);
renderstripssky();