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GRIM: Set a spot exponent to simulate DirectX's penumbra.

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Effect is especially visible near set do's window.
This commit is contained in:
Vincent Pelletier 2014-06-01 23:12:31 +02:00
parent 446c40384f
commit b2fcde697a
1 changed files with 3 additions and 0 deletions
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3
engines/grim/gfx_opengl.cpp
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@ -801,6 +801,7 @@ void GfxOpenGL::setupLight(Light *light, int lightId) {
GLfloat lightPos[] = { 0.0f, 0.0f, 0.0f, 1.0f };
GLfloat lightDir[] = { 0.0f, 0.0f, -1.0f };
GLfloat cutoff = 180.0f;
GLfloat spot_exp = 0.0f;
GLfloat intensity = light->_intensity;
diffuse[0] = ((GLfloat)light->_color.getRed() / 15.0f) * intensity;
@ -826,6 +827,7 @@ void GfxOpenGL::setupLight(Light *light, int lightId) {
specular[0] = diffuse[0];
specular[1] = diffuse[1];
specular[2] = diffuse[2];
spot_exp = 2.0f;
cutoff = light->_penumbraangle;
}
@ -834,6 +836,7 @@ void GfxOpenGL::setupLight(Light *light, int lightId) {
glLightfv(GL_LIGHT0 + lightId, GL_SPECULAR, specular);
glLightfv(GL_LIGHT0 + lightId, GL_POSITION, lightPos);
glLightfv(GL_LIGHT0 + lightId, GL_SPOT_DIRECTION, lightDir);
glLightf(GL_LIGHT0 + lightId, GL_SPOT_EXPONENT, spot_exp);
glLightf(GL_LIGHT0 + lightId, GL_SPOT_CUTOFF, cutoff);
glLightf(GL_LIGHT0 + lightId, GL_QUADRATIC_ATTENUATION, 0.2f);
glEnable(GL_LIGHT0 + lightId);