Ray Camera::generateRay( float uPos, float vPos, float imagePlaneApectRatio ) const
{
calcMatrices();
float s = ( uPos - 0.5f ) * imagePlaneApectRatio;
float t = ( vPos - 0.5f );
float viewDistance = imagePlaneApectRatio / math<float>::abs( mFrustumRight - mFrustumLeft ) * mNearClip;
return Ray( mEyePoint, ( mU * s + mV * t - ( mW * viewDistance ) ).normalized() );
}
void Camera::getFrustum( float *left, float *top, float *right, float *bottom, float *near, float *far ) const
{
calcMatrices();
*left = mFrustumLeft;
*top = mFrustumTop;
*right = mFrustumRight;
*bottom = mFrustumBottom;
*near = mNearClip;
*far = mFarClip;
}
void Camera::getNearClipCoordinates( vec3 *topLeft, vec3 *topRight, vec3 *bottomLeft, vec3 *bottomRight ) const
{
calcMatrices();
vec3 viewDirection = normalize( mViewDirection );
*topLeft = mEyePoint + (mNearClip * viewDirection) + (mFrustumTop * mV) + (mFrustumLeft * mU);
*topRight = mEyePoint + (mNearClip * viewDirection) + (mFrustumTop * mV) + (mFrustumRight * mU);
*bottomLeft = mEyePoint + (mNearClip * viewDirection) + (mFrustumBottom * mV) + (mFrustumLeft * mU);
*bottomRight = mEyePoint + (mNearClip * viewDirection) + (mFrustumBottom * mV) + (mFrustumRight * mU);
}
void Camera::getFarClipCoordinates( Vec3f *topLeft, Vec3f *topRight, Vec3f *bottomLeft, Vec3f *bottomRight ) const
{
calcMatrices();
Vec3f viewDirection( mViewDirection );
viewDirection.normalize();
float ratio = mFarClip / mNearClip;
*topLeft = mEyePoint + (mFarClip * viewDirection) + (ratio * mFrustumTop * mV) + (ratio * mFrustumLeft * mU);
*topRight = mEyePoint + (mFarClip * viewDirection) + (ratio * mFrustumTop * mV) + (ratio * mFrustumRight * mU);
*bottomLeft = mEyePoint + (mFarClip * viewDirection) + (ratio * mFrustumBottom * mV) + (ratio * mFrustumLeft * mU);
*bottomRight = mEyePoint + (mFarClip * viewDirection) + (ratio * mFrustumBottom * mV) + (ratio * mFrustumRight * mU);
}
void CameraStereo::getNearClipCoordinates( vec3 *topLeft, vec3 *topRight, vec3 *bottomLeft, vec3 *bottomRight ) const
{
calcMatrices();
vec3 viewDirection = normalize( mViewDirection );
vec3 eye( getEyePointShifted() );
float shift = 0.5f * mEyeSeparation * (mNearClip / mConvergence);
shift *= (mIsStereo ? (mIsLeft ? 1.0f : -1.0f) : 0.0f);
float left = mFrustumLeft + shift;
float right = mFrustumRight + shift;
*topLeft = eye + (mNearClip * viewDirection) + (mFrustumTop * mV) + (left * mU);
*topRight = eye + (mNearClip * viewDirection) + (mFrustumTop * mV) + (right * mU);
*bottomLeft = eye + (mNearClip * viewDirection) + (mFrustumBottom * mV) + (left * mU);
*bottomRight = eye + (mNearClip * viewDirection) + (mFrustumBottom * mV) + (right * mU);
}
