C++ (Cpp) HPoint示例

示例#1

文件： PX2Renderer.cpp 项目： manyxu/Phoenix3D_2.0

//----------------------------------------------------------------------------
Vector2f Renderer::PointWorldToViewPort (const  APoint &point, bool *isInBack)
{
	HMatrix matProjView = GetProjectionMatrix() * GetViewMatrix();
	HPoint hPoint(point.X(), point.Y(), point.Z(), point.W());
	HPoint tempPoint = matProjView * hPoint;

	if (isInBack)
	{
		if (tempPoint.Z() <= 0)
			*isInBack = true;
		else
			*isInBack = false;
	}

	float wInv = 1.0f / tempPoint.W();

	//投影坐标范围为[-1,1]要变成[0,1]
	Vector2f screenPoint;
	screenPoint.X() = (1.0f + tempPoint.X()*wInv)/2.0f;
	screenPoint.Y() = (1.0f + tempPoint.Y()*wInv)/2.0f;

	//投影坐标范围为[0,1]要变成视口内坐标
	int viewX, viewY, viewW, viewH;
	GetViewport(viewX, viewY, viewW, viewH);

	screenPoint.X() = viewX + screenPoint.X()*viewW;
	screenPoint.Y() = viewY + screenPoint.Y()*viewH;

	return screenPoint;
}

示例#2

文件： PX2RenderStep.cpp 项目： bobbyzhu/Phoenix3D

//----------------------------------------------------------------------------
Vector2f RenderStep::PointWorldToViewPort(const APoint &point,
	bool *isInBack)
{
	Rectf viewPort = mViewPort;
	if (viewPort.IsEmpty())
		viewPort = Rectf(0.0f, 0.0f, mSize.Width, mSize.Height);

	HMatrix matProjView = mCamera->GetProjectionMatrix() * mCamera->GetViewMatrix();
	HPoint hPoint(point.X(), point.Y(), point.Z(), point.W());
	HPoint tempPoint = matProjView * hPoint;

	if (isInBack)
	{
		if (tempPoint.Z() <= 0)
			*isInBack = true;
		else
			*isInBack = false;
	}

	float wInv = 1.0f / tempPoint.W();

	//投影坐标范围为[-1,1]要变成[0,1]
	Vector2f screenPoint;
	screenPoint.X() = (1.0f + tempPoint.X()*wInv) / 2.0f;
	screenPoint.Y() = (1.0f + tempPoint.Y()*wInv) / 2.0f;

	//投影坐标范围为[0,1]要变成视口内坐标
	screenPoint.X() = viewPort.Left + screenPoint.X()*viewPort.Width();
	screenPoint.Y() = viewPort.Bottom + screenPoint.Y()*viewPort.Height();

	return screenPoint;
}

示例#3

文件： OmniMapQuartz.cpp 项目： elumenati/omnimap

void OmniMapChannelQuartz::TransformPoint(float mat[16], float pt[3], float transformedPt[3])
{
	HPoint ptToTrans(&(pt[0]));
	
	simMatrix_4x4 theTransform(&mat[0]);
	HPoint transedPt;
	
	theTransform.transformPoint(ptToTrans, transedPt);
	
	transformedPt[0] = transedPt.getVal(0);
	transformedPt[1] = transedPt.getVal(1);
	transformedPt[2] = transedPt.getVal(2);

}

示例#4

文件： PX2SceneNodeCtrl.cpp 项目： JamShan/Phoenix3D_2.1

//----------------------------------------------------------------------------
PX2::AVector SceneNodeCtrl::GetZDir()
{
	HPoint vector;
	mCtrlsGroup->WorldTransform.GetRotate().GetRow(2, vector);
	return AVector(vector.X(), vector.Y(), vector.Z());
}