NVECTOR2 IGraphicObject::GetBasePosOffset()
{
IRenderer* pRenderer = GetScene()->GetRenderer();
UINT mainWidth = pRenderer->GetMainBufferWidth();
UINT mainHeight = pRenderer->GetMainBufferHeight();
//Position Offset
NVECTOR2 outBaseTopLeftPixel = *m_pBaseScreenSpacePosOffset;
//mFunction_ConvertFloatVec2PixelVec(outBaseTopLeftPixel);
outBaseTopLeftPixel.x = outBaseTopLeftPixel.x *float(mainWidth) / 2.0f;
outBaseTopLeftPixel.y = - outBaseTopLeftPixel.y * float(mainHeight) / 2.0f;
return outBaseTopLeftPixel;
}
inline float IGraphicObject::mFunction_ConvertPixelLength2FloatLength(float pxLen, BOOL isWidth)
{
IRenderer* pRenderer = GetScene()->GetRenderer();
UINT mainWidth = pRenderer->GetMainBufferWidth();
UINT mainHeight = pRenderer->GetMainBufferHeight();
float outLength = 0;
//PIXEL SPACE TO [-1,1] SCR SPACE
if (isWidth)
{
outLength = pxLen*2.0f / (float)mainWidth;
}
else
{
outLength = pxLen * 2.0f / (float)mainHeight;
}
return outLength;
}
void IGraphicObject::mFunction_ConvertFloatVec2PixelVec(NVECTOR2 & in_out_vec)
{
// --------->
// |
// | PIXEL SPACE
// |
// ^
// |
// --------|--------->
// | SCR SPACE
// |
IRenderer* pRenderer = GetScene()->GetRenderer();
UINT mainWidth = pRenderer->GetMainBufferWidth();
UINT mainHeight = pRenderer->GetMainBufferHeight();
in_out_vec.x = float(mainWidth) *((in_out_vec.x + 1.0f) / 2.0f);
in_out_vec.y = float(mainHeight)*((1.0f - in_out_vec.y) / 2.0f);
};
void IGraphicObject::SetBasePosOffset(NVECTOR2 pixelOffset)
{
// --------->
// |
// | PIXEL SPACE
// |
// ^
// |
// --------|--------->
// | SCR SPACE
// |
IRenderer* pRenderer = GetScene()->GetRenderer();
UINT mainWidth = pRenderer->GetMainBufferWidth();
UINT mainHeight = pRenderer->GetMainBufferHeight();
pixelOffset.x = pixelOffset.x * 2.0f / float(mainWidth);
pixelOffset.y = -pixelOffset.y*2.0f / float(mainHeight);
//vector difference
NVECTOR2 offsetV = pixelOffset - (*m_pBaseScreenSpacePosOffset);
if (offsetV.x ==0.0f && offsetV.y == 0.0f)return;
*m_pBaseScreenSpacePosOffset = pixelOffset;
//update vertices, deviate with the upper difference
for (UINT i = 0;i < NOISE_GRAPHIC_OBJECT_BUFFER_COUNT;i++)
{
if (i == NOISE_GRAPHIC_OBJECT_TYPE_LINE_3D || i == NOISE_GRAPHIC_OBJECT_TYPE_POINT_3D)continue;
for (UINT j = 0;j < m_pVB_Mem[i]->size();++j)
//for (auto &v : *m_pVB_Mem[i])
{
m_pVB_Mem[i]->at(j).Pos.x += offsetV.x;
m_pVB_Mem[i]->at(j).Pos.y += offsetV.y;
}
mCanUpdateToGpu[i] = TRUE;
}
}
inline void IGraphicObject::mFunction_ConvertPixelVec2FloatVec(NVECTOR2& vec)
{
// --------->
// |
// | PIXEL SPACE
// |
// ^
// |
// --------|--------->
// | SCR SPACE
// |
IRenderer* pRenderer = GetScene()->GetRenderer();
UINT mainWidth = pRenderer->GetMainBufferWidth();
UINT mainHeight = pRenderer->GetMainBufferHeight();
//PIXEL SPACE TO [-1,1] SCR SPACE
float halfW= (float)mainWidth / 2.0f;
float halfH = (float)mainHeight / 2.0f;
vec.x = (vec.x / halfW)- 1.0f;
vec.y=1.0f - (vec.y / halfH);
//vec -= *m_pBaseScreenSpacePosOffset;
}