public void InitializeCamera(float3 _Position, float3 _Target, float3 _Up)
{
// Build the camera matrix
float3 At = _Target - _Position;
if (At.LengthSquared > 1e-2f)
{ // Normal case
m_CameraTargetDistance = At.Length;
At /= m_CameraTargetDistance;
}
else
{ // Special bad case
m_CameraTargetDistance = 0.01f;
At = new float3(0.0f, 0.0f, -1.0f);
}
float3 Ortho = _Up.Cross(At).Normalized;
float4x4 CameraMat = float4x4.Identity;
CameraMat.r3 = new float4(_Position, 1.0f);
CameraMat.r2 = new float4(At, 0.0f);
CameraMat.r0 = new float4(Ortho, 0.0f);
CameraMat.r1 = new float4(At.Cross(Ortho), 0.0f);
CameraTransform = CameraMat;
// Setup the normalized target distance
m_NormalizedTargetDistance = NormalizeTargetDistance(m_CameraTargetDistance);
}
public void InitializeCamera(float3 _position, float3 _target, float3 _up)
{
// Build the camera matrix
float3 At = _target - _position;
if (At.LengthSquared > 1e-2f)
{
// Normal case
m_CameraTargetDistance = At.Length;
At /= m_CameraTargetDistance;
}
else
{
// Special bad case
m_CameraTargetDistance = 0.01f;
At = new float3(0.0f, 0.0f, -1.0f);
}
float3 ortho = _up.Cross(At).Normalized;
float4x4 cameraMat = float4x4.Identity;
cameraMat[3] = new float4(_position, 1.0f);
cameraMat[2] = new float4(At, 0.0f);
cameraMat[0] = new float4(ortho, 0.0f);
cameraMat[1] = new float4(At.Cross(ortho), 0.0f);
CameraTransform = cameraMat;
// Setup the normalized target distance
m_NormalizedTargetDistance = NormalizeTargetDistance(m_CameraTargetDistance);
}