void Scene::Render(ci::Surface8u *surface) {
Surface8u::Iter iter = surface->getIter();
int width = surface->getWidth();
int height = surface->getHeight();
float aspectRatio = width / (float)height;
Color8u bgColor(25, 25, 25);
while (iter.line()) {
while (iter.pixel()) {
ColorA aaColor(0, 0, 0);
int count = 0;
int numSamples = 4;
float deltaX = 1.0f / (width * numSamples);
float deltaY = 1.0f / (height * numSamples);
for (int i = 0; i < numSamples; i++) {
for (int j = 0; j < numSamples; j++) {
float inDist = 10000.0f;
float u = iter.x()/(float)width + deltaX * i;
float v = iter.y()/(float)height + deltaY * j;
ci::Ray ray = m_camera->generateRay(u, v, aspectRatio);
aaColor += Raytrace(ray, 0, inDist, 1.0f);
count++;
}
}
ColorA color = aaColor / (float)count;
iter.r() = ci::math<float>::clamp(bgColor.r * (1.0f - color.a) + color.r * 255.0f, 0.0f, 255.0f);
iter.g() = ci::math<float>::clamp(bgColor.g * (1.0f - color.a) + color.g * 255.0f, 0.0f, 255.0f);
iter.b() = ci::math<float>::clamp(bgColor.b * (1.0f - color.a) + color.b * 255.0f, 0.0f, 255.0f);
}
//iter.line();
}
}
void _TBOX_PREFIX_App::setup()
{
mCubeRotation.setToIdentity();
// Create a blue-green gradient as an OpenGL texture
Surface8u surface( 256, 256, false );
Surface8u::Iter iter = surface.getIter();
while( iter.line() ) {
while( iter.pixel() ) {
iter.r() = 0;
iter.g() = iter.x();
iter.b() = iter.y();
}
}
mTex = gl::Texture( surface );
}
void RayMarcher::render( ci::Surface8u *surface )
{
Surface8u::Iter iter = surface->getIter();
// transform the spheres
int width = surface->getWidth();
int height = surface->getHeight();
float imageAspect = width / (float)height;
Color8u backgroundColor( 0, 95, 249 );
while( iter.line() ) {
while( iter.pixel() ) {
ColorA color = march( mCamera->generateRay( iter.x() / (float)width, 1.0f - iter.y() / (float)height, imageAspect ) );
iter.r() = backgroundColor.r * ( 1.0f - color.a ) + color.r * 255;
iter.g() = backgroundColor.g * ( 1.0f - color.a ) + color.g * 255;
iter.b() = backgroundColor.b * ( 1.0f - color.a ) + color.b * 255;
}
iter.line();
}
}
