static Matrix4<T> LookAtWithVector(const Vector3<T>& eye,
const Vector3<T>& lookVector, const Vector3<T>& up) {
Vector3<T> z = lookVector.Normalized();
Vector3<T> x = up.Cross(z).Normalized();
Vector3<T> y = z.Cross(x).Normalized();
Matrix4<T> m;
m.x = Vector4<T>(x, 0);
m.y = Vector4<T>(y, 0);
m.z = Vector4<T>(z, 0);
m.w = Vector4<T>(0, 0, 0, 1);
Vector4<T> eyePrime = m * Vector4<T>(-eye, 1);
m = m.Transposed();
m.w = eyePrime;
return m;
}
static Matrix4<T> Translate(T x, T y, T z) {
Matrix4 m;
m.x.x = 1;
m.x.y = 0;
m.x.z = 0;
m.x.w = 0;
m.y.x = 0;
m.y.y = 1;
m.y.z = 0;
m.y.w = 0;
m.z.x = 0;
m.z.y = 0;
m.z.z = 1;
m.z.w = 0;
m.w.x = x;
m.w.y = y;
m.w.z = z;
m.w.w = 1;
return m.Transposed();
}
static Matrix4<T> Translate(const Vector3<T>& v) {
Matrix4 m;
m.x.x = 1;
m.x.y = 0;
m.x.z = 0;
m.x.w = 0;
m.y.x = 0;
m.y.y = 1;
m.y.z = 0;
m.y.w = 0;
m.z.x = 0;
m.z.y = 0;
m.z.z = 1;
m.z.w = 0;
m.w.x = v.x;
m.w.y = v.y;
m.w.z = v.z;
m.w.w = 1;
return m.Transposed();
}
static Matrix4<T> LookAt(const Vector3<T>& eye,
const Vector3<T>& target,
const Vector3<T>& up)
{
Vector3<T> z = (eye - target).Normalized();
Vector3<T> x = up.Cross(z).Normalized();
Vector3<T> y = z.Cross(x).Normalized();
Matrix4<T> m;
m.x = Vector4<T>(x, 0.0f);
m.y = Vector4<T>(y, 0.0f);
m.z = Vector4<T>(z, 0.0f);
m.w = Vector4<T>(0, 0, 0, 1);
Vector4<T> eyePrime = m * Vector4<T>(-eye, 1);
m = m.Transposed();
m.w = eyePrime;
return m;
}
GLColorBuffer GLCameraBlurFilter::Filter(GLColorBuffer input, float radialBlur) {
SPADES_MARK_FUNCTION();
if(radialBlur > 0.f)
radialBlur = 1.f - radialBlur;
else
radialBlur = 1.f;
bool hasRadialBlur = radialBlur < .9999f;
IGLDevice *dev = renderer->GetGLDevice();
GLQuadRenderer qr(dev);
dev->Enable(IGLDevice::Blend, false);
static GLProgramAttribute programPosition("positionAttribute");
static GLProgramUniform programTexture("texture");
static GLProgramUniform programDepthTexture("depthTexture");
static GLProgramUniform programReverseMatrix("reverseMatrix");
static GLProgramUniform programShutterTimeScale("shutterTimeScale");
programPosition(program);
programTexture(program);
programDepthTexture(program);
programReverseMatrix(program);
programShutterTimeScale(program);
const client::SceneDefinition& def = renderer->GetSceneDef();
Matrix4 newMatrix = Matrix4::Identity();
newMatrix.m[0] = def.viewAxis[0].x;
newMatrix.m[1] = def.viewAxis[1].x;
newMatrix.m[2] = def.viewAxis[2].x;
newMatrix.m[4] = def.viewAxis[0].y;
newMatrix.m[5] = def.viewAxis[1].y;
newMatrix.m[6] = def.viewAxis[2].y;
newMatrix.m[8] = def.viewAxis[0].z;
newMatrix.m[9] = def.viewAxis[1].z;
newMatrix.m[10] = def.viewAxis[2].z;
// othrogonal matrix can be reversed fast
Matrix4 inverseNewMatrix = newMatrix.Transposed();
Matrix4 diffMatrix = prevMatrix * inverseNewMatrix;
prevMatrix = newMatrix;
Matrix4 reverseMatrix = ReverseMatrix(diffMatrix);
if(diffMatrix.m[0] < .3f ||
diffMatrix.m[5] < .3f ||
diffMatrix.m[10] < .3f){
// too much change
if(hasRadialBlur) {
diffMatrix = Matrix4::Identity();
}else{
// skip blur
return input;
}
}
float movePixels = MyACos(diffMatrix.m[0]);
float shutterTimeScale = .3f;
movePixels = std::max(movePixels, MyACos(diffMatrix.m[5]));
movePixels = std::max(movePixels, MyACos(diffMatrix.m[10]));
movePixels = tanf(movePixels) / tanf(def.fovX * .5f);
movePixels *= (float)dev->ScreenWidth() * .5f;
movePixels *= shutterTimeScale;
movePixels = std::max(movePixels,
(1.f - radialBlur) * dev->ScreenWidth() * 0.5f);
if(movePixels < 1.f){
// too less change, skip camera blur
return input;
}
int levels = (int)ceilf(logf(movePixels) / logf(5.f));
if(levels <= 0)
levels = 1;
if(hasRadialBlur)
radialBlur *= radialBlur;
reverseMatrix = Matrix4::Scale(radialBlur, radialBlur, 1.f)
* reverseMatrix;
program->Use();
programTexture.SetValue(0);
programDepthTexture.SetValue(1);
programReverseMatrix.SetValue(reverseMatrix);
// composite to the final image
GLColorBuffer buf = input;
qr.SetCoordAttributeIndex(programPosition());
dev->ActiveTexture(1);
dev->BindTexture(IGLDevice::Texture2D, renderer->GetFramebufferManager()->GetDepthTexture());
dev->ActiveTexture(0);
for(int i = 0; i < levels; i++){
GLProfiler measure(dev, "Apply [%d / %d]", i+1,levels);
GLColorBuffer output = input.GetManager()->CreateBufferHandle();
programShutterTimeScale.SetValue(shutterTimeScale);
dev->BindTexture(IGLDevice::Texture2D, buf.GetTexture());
dev->BindFramebuffer(IGLDevice::Framebuffer, output.GetFramebuffer());
dev->Viewport(0, 0, output.GetWidth(), output.GetHeight());
qr.Draw();
dev->BindTexture(IGLDevice::Texture2D, 0);
shutterTimeScale /= 5.f;
buf = output;
}
dev->ActiveTexture(1);
dev->BindTexture(IGLDevice::Texture2D, 0);
dev->ActiveTexture(0);
return buf;
}