/// <summary>
/// Sets up and initializes the viewport by setting the Uniforms
/// </summary>
public void SetupViewport(ViewportInfo viewport)
{
Transform mv = new Transform();
bool haveModelView = false;
if (m_Uniforms.rglModelViewProjectionMatrix >= 0)
{
Transform mvp = viewport.GetXform(CoordinateSystem.World, CoordinateSystem.Clip);
m_MVPXform = mvp;
float[] modelViewProjection = mvp.ToFloatArray(false);
GL.UniformMatrix4(m_Uniforms.rglModelViewProjectionMatrix, 1, false, modelViewProjection);
}
if (m_Uniforms.rglModelViewMatrix >= 0)
{
mv = viewport.GetXform(CoordinateSystem.World, CoordinateSystem.Camera);
m_MVXform = mv;
haveModelView = true;
float[] modelView = mv.ToFloatArray(false);
GL.UniformMatrix4(m_Uniforms.rglModelViewMatrix, 1, false, modelView);
}
if (m_Uniforms.rglProjectionMatrix >= 0)
{
Transform pr = viewport.GetXform(CoordinateSystem.Camera, CoordinateSystem.Clip);
float[] projection = pr.ToFloatArray(false);
GL.UniformMatrix4(m_Uniforms.rglProjectionMatrix, 1, false, projection);
}
if (m_Uniforms.rglNormalMatrix >= 0)
{
float[] normalMatrix = new float[9];
if (!haveModelView)
{
mv = viewport.GetXform(CoordinateSystem.World, CoordinateSystem.Camera);
m_MVXform = mv;
}
Matrix4Dto3F(mv, ref normalMatrix, false);
GL.UniformMatrix3(m_Uniforms.rglNormalMatrix, 1, false, normalMatrix);
}
}
/// <summary>
/// LateralPan of a viewport between two points
/// </summary>
public static void LateralPan(this ViewportInfo viewport, CGPoint fromPoint, CGPoint toPoint, bool flipX, bool flipY)
{
double deltaX, deltaY, s;
Rhino.Geometry.Transform s2c = viewport.GetXform(CoordinateSystem.Screen, CoordinateSystem.Clip);
Rhino.Geometry.Point3d screenPoint0 = new Rhino.Geometry.Point3d(fromPoint.X, fromPoint.Y, 0.0);
Rhino.Geometry.Point3d screenPoint1 = new Rhino.Geometry.Point3d(toPoint.X, toPoint.Y, 0.0);
Rhino.Geometry.Point3d clipPoint0 = s2c * screenPoint0;
Rhino.Geometry.Point3d clipPoint1 = s2c * screenPoint1;
deltaX = 0.5 * (clipPoint1.X - clipPoint0.X);
deltaY = 0.5 * (clipPoint1.Y - clipPoint0.Y);
deltaX *= (viewport.FrustumRight - viewport.FrustumLeft);
deltaY *= (viewport.FrustumBottom - viewport.FrustumTop);
if (viewport.IsPerspectiveProjection)
{
s = viewport.TargetPoint.DistanceTo(viewport.CameraLocation) / viewport.FrustumNear;
deltaX *= flipX ? -s : s;
deltaY *= flipY ? -s : s;
}
Rhino.Geometry.Vector3d dollyVector = (deltaX * viewport.CameraX) + (deltaY * viewport.CameraY);
viewport.TargetPoint = viewport.TargetPoint - dollyVector;
viewport.SetCameraLocation(viewport.CameraLocation - dollyVector);
}