pair<bool, Vec3> Planar::intersect(Ray &ray){
// declare the impact point
Vec3 impact_point = ray.getOrigin();
// normalize the vector (n is already normalized)
Vec3 l0 = ray.getOrigin();
Vec3 l = ray.getDirection();
// calcul the denominator
float denom = l * n;
// if the ray and the normal vector of the planar isn't parallel
if (denom > 1e-6) {
// calcul t for determinate if the ray intersect the planar
float t = ((position - l0) * n) / denom;
// calcul the impact point
impact_point = l0 + l * t;
// verif if the impact point is in the square
if (impact_point.getX() < maxCoordinates().getX() && impact_point.getX() > minCoordinates().getX()
&& impact_point.getY() < maxCoordinates().getY() && impact_point.getY() > minCoordinates().getY()
/*&& impact_point.getZ() <= maxCoordinates().getZ() && impact_point.getZ() >= minCoordinates().getZ()*/){
return pair<bool, Vec3>(t >= 0, impact_point);
}
else{
return pair<bool, Vec3>(false, impact_point);
}
}
return pair<bool, Vec3>(false, impact_point);
}
///=====================================================
///
///=====================================================
const Vec2s AnimatedTexture::CalcTextureCoordinatesAtSpriteNumber(unsigned int spriteNumber) const{
Vec2 minCoordinates((float)(spriteNumber % m_cellsPerRow) * m_inverseCellsPerRow, floor((float)spriteNumber * m_inverseCellsPerRow) * m_inverseCellsPerColumn);
Vec2s textureCoordinates;
textureCoordinates.push_back(minCoordinates + Vec2(0.0001f, m_inverseCellsPerColumn - 0.0002f)); //small additions are to fix black outlines around textures;
textureCoordinates.push_back(minCoordinates + Vec2(m_inverseCellsPerRow - 0.0002f, m_inverseCellsPerColumn - 0.0002f));
textureCoordinates.push_back(minCoordinates + Vec2(m_inverseCellsPerRow - 0.0002f, 0.0001f));
textureCoordinates.push_back(minCoordinates + Vec2(0.0001f, 0.0001f));
return textureCoordinates;
}
///=====================================================
///
///=====================================================
const Vec2s AnimatedTexture::CalcTextureCoordinatesAtPercentComplete(double percentComplete) const{
unsigned int cellNumber = (unsigned int)((double)m_numberOfSprites * percentComplete);
Vec2 minCoordinates((float)(cellNumber % m_cellsPerRow) * m_inverseCellsPerRow, floor((float)cellNumber * m_inverseCellsPerRow) * m_inverseCellsPerColumn);
Vec2s textureCoordinates;
textureCoordinates.push_back(minCoordinates + Vec2(0.0001f, m_inverseCellsPerColumn - 0.0002f)); //small additions are to fix black outlines around textures;
textureCoordinates.push_back(minCoordinates + Vec2(m_inverseCellsPerRow - 0.0002f, m_inverseCellsPerColumn - 0.0002f));
textureCoordinates.push_back(minCoordinates + Vec2(m_inverseCellsPerRow - 0.0002f, 0.0001f));
textureCoordinates.push_back(minCoordinates + Vec2(0.0001f, 0.0001f));
return textureCoordinates;
}
///=====================================================
///
///=====================================================
const Vec2 AnimatedTexture::CalcMinimumTextureCoordinatesAtSpriteNumber(unsigned int spriteNumber) const{
Vec2 minCoordinates((float)(spriteNumber % m_cellsPerRow) * m_inverseCellsPerRow, floor((float)spriteNumber * m_inverseCellsPerRow) * m_inverseCellsPerColumn);
return minCoordinates;
}
///=====================================================
///
///=====================================================
const Vec2 AnimatedTexture::CalcMinimumTextureCoordinatesAtPercentComplete(double percentComplete) const{
unsigned int cellNumber = (unsigned int)((double)m_numberOfSprites * percentComplete);
Vec2 minCoordinates((float)(cellNumber % m_cellsPerRow) * m_inverseCellsPerRow, floor((float)cellNumber * m_inverseCellsPerRow) * m_inverseCellsPerColumn);
return minCoordinates;
}
