void Sphere::drawImposterSphere(Vector3 position, double radius, prog3d::Color color)
{
glDisable(GL_COLOR_MATERIAL);
// Set color
float matColor[4];
matColor[0] = (float)color.r();
matColor[1] = (float)color.g();
matColor[2] = (float)color.b();
matColor[3] = (float)color.a();
glMaterialfv(GL_FRONT, GL_DIFFUSE, matColor);
// Draw Imposter Shader Sphere
glUseProgram(_program);
glUniform1f(_uni_sphereRadius,radius);
glUniform3f(_uni_spherePos,position.x(),position.y(),position.z());
glBegin(GL_TRIANGLE_STRIP);
glVertexAttrib1f(_atr_vertexID,0.0);
glVertexAttrib1f(_atr_vertexID,1.0);
glVertexAttrib1f(_atr_vertexID,2.0);
glVertexAttrib1f(_atr_vertexID,3.0);
glEnd();
glUseProgram(0);
glEnable(GL_COLOR_MATERIAL);
}
void Texture::setAlpha(const prog3d::Color &c,double v,double radius) {
if (_img!=NULL) {
for(int i=0;i<_img->width();i++) {
for(int j=0;j<_img->height();j++) {
QColor cq=_img->pixel(i,j);
double dist=Vector3(cq.redF()-c.r(),cq.greenF()-c.g(),cq.blueF()-c.b()).length();
if (dist<radius)
cq.setAlphaF(v);//1.0-(radius-dist)/radius);
_img->setPixel(i,j,cq.rgba());
}
}
toGL();
}
}