C++ USRect::Init方法代码示例

//----------------------------------------------------------------//
bool MOAIVertexFormat::ComputeBounds ( void* buffer, u32 size, USRect& bounds ) {

	u32 total = this->mVertexSize ? ( size / this->mVertexSize ) : 0;
	if ( !total ) return false;

	u32 coordAttributeIdx = this->mAttributeUseTable [ ARRAY_VERTEX ].mAttrID;
	if ( coordAttributeIdx >= this->mTotalAttributes ) return false;

	MOAIVertexAttribute& coordAttr = this->mAttributes [ coordAttributeIdx ];
	if ( coordAttr.mType != GL_FLOAT ) return false; // TODO: handle other types
	if ( coordAttr.mSize < 2 ) return false;
	
	buffer = ( void* )(( size_t )buffer + coordAttr.mOffset );
	
	USVec2D* coord = ( USVec2D* )buffer;
	bounds.Init ( *coord );
	bounds.Inflate ( 0.0000001f ); // prevent 'empty' bounds on cardinal direction lines or single vertex objects
	
	for ( u32 i = 1; i < total; ++i ) {
		
		buffer = ( void* )(( size_t )buffer + this->mVertexSize );
		coord = ( USVec2D* )buffer;
		bounds.Grow ( *coord );
	}
	return true;
}

//----------------------------------------------------------------//
USRect MOAIGfxQuadListDeck2D::GetBounds ( u32 idx, MOAIDeckRemapper* remapper ) {

	USRect rect;
	rect.Init ( 0.0f, 0.0f, 0.0f, 0.0f );

	u32 size = this->mSprites.Size ();
	if ( size ) {

		idx = remapper ? remapper->Remap ( idx ) : idx;
		idx = ( idx - 1 ) % size;
	
		USSprite& sprite = this->mSprites [ idx ];
		
		if ( sprite.mTotalPairs ) {
			
			USSpritePair prim = this->mPairs [ sprite.mBasePair ];
			USQuad& baseQuad = this->mQuads [ prim.mQuadID ];
			
			baseQuad.GetBounds ( rect );
			
			for ( u32 i = 1; i < sprite.mTotalPairs; ++i ) {
				
				prim = this->mPairs [ sprite.mBasePair + i ];
				USQuad& quad = this->mQuads [ prim.mQuadID ];
				
				rect.Grow ( quad.mV [ 0 ]);
				rect.Grow ( quad.mV [ 1 ]);
				rect.Grow ( quad.mV [ 2 ]);
				rect.Grow ( quad.mV [ 3 ]);
			}
		}
	}
	return rect;
}

//----------------------------------------------------------------//
USRect MOAIDeck::GetBounds ( u32 idx, MOAIDeckRemapper* remapper ) {
	UNUSED ( idx );
	UNUSED ( remapper );

	USRect rect;
	rect.Init ( 0.0f, 0.0f, 0.0f, 0.0f );
	return rect;
}

//----------------------------------------------------------------//
USRect MOAIQuadBrush::GetUVBounds () {

	USRect rect;
	
	rect.Init ( this->mUV [ 0 ]);
	rect.Grow ( this->mUV [ 1 ]);
	rect.Grow ( this->mUV [ 2 ]);
	rect.Grow ( this->mUV [ 3 ]);
	
	return rect;
}

//----------------------------------------------------------------//
USRect MOAIQuadBrush::GetVtxBounds () {

	USRect rect;
	
	rect.Init ( this->mVtx [ 0 ]);
	rect.Grow ( this->mVtx [ 1 ]);
	rect.Grow ( this->mVtx [ 2 ]);
	rect.Grow ( this->mVtx [ 3 ]);
	
	return rect;
}

//----------------------------------------------------------------//
USRect USGLQuad::GetVtxBounds () {

	USRect rect;
	
	rect.Init ( this->mVtx [ 0 ]);
	rect.Grow ( this->mVtx [ 1 ]);
	rect.Grow ( this->mVtx [ 2 ]);
	rect.Grow ( this->mVtx [ 3 ]);
	
	return rect;
}

//----------------------------------------------------------------//
USRect USGLQuad::GetUVBounds () {

	USRect rect;
	
	rect.Init ( this->mUV [ 0 ]);
	rect.Grow ( this->mUV [ 1 ]);
	rect.Grow ( this->mUV [ 2 ]);
	rect.Grow ( this->mUV [ 3 ]);
	
	return rect;
}

//----------------------------------------------------------------//
USRect MOAIMesh::GetBounds ( u32 idx, MOAIDeckRemapper* remapper ) {
	UNUSED ( idx );
	UNUSED ( remapper );
	
	if ( this->mVertexBuffer ) {
		return this->mVertexBuffer->GetBounds ();
	}
	USRect bounds;
	bounds.Init ( 0.0f, 0.0f, 0.0f, 0.0f );
	return bounds;
}

//----------------------------------------------------------------//
USRect MOAISurfaceDeck2D::GetRect ( u32 idx, MOAIDeckRemapper* remapper ) {

    idx = remapper ? remapper->Remap ( idx ) : idx;
    idx = idx - 1;

    if ( idx < this->mBrushes.Size ()) {
        return this->mBrushes [ idx ].mBounds;
    }

    USRect rect;
    rect.Init ( 0.0f, 0.0f, 0.0f, 0.0f );
    return rect;
}

USRect MOAIGfxQuadDeck2D::GetRect ( ) {

	u32 size = this->mQuads.Size ();
	USRect totalRect;
	totalRect.Init ( 0.0f, 0.0f, 0.0f, 0.0f );

	for ( u32 i = 0; i < size; ++i ) {
		MOAIQuadBrush& quad = this->mQuads [ i ];
		USRect rect = quad.GetVtxBounds ();

		totalRect.Grow ( rect );
	}
	return totalRect;
}

//----------------------------------------------------------------//
bool USFrustum::GetXYSectRect ( const USAffine3D& mtx, USRect& rect ) const {

	u32 nHits = 0;
	USVec2D hits [ 12 ];

	USVec3D nlt = this->mPoints [ NEAR_LT_POINT ];
	USVec3D nrt = this->mPoints [ NEAR_RT_POINT ];
	USVec3D nrb = this->mPoints [ NEAR_RB_POINT ];
	USVec3D nlb = this->mPoints [ NEAR_LB_POINT ];
	
	USVec3D flt = this->mPoints [ FAR_LT_POINT ];
	USVec3D frt = this->mPoints [ FAR_RT_POINT ];
	USVec3D frb = this->mPoints [ FAR_RB_POINT ];
	USVec3D flb = this->mPoints [ FAR_LB_POINT ];
	
	mtx.Transform ( nlt );
	mtx.Transform ( nrt );
	mtx.Transform ( nrb );
	mtx.Transform ( nlb );
	
	mtx.Transform ( flt );
	mtx.Transform ( frt );
	mtx.Transform ( frb );
	mtx.Transform ( flb );
	
	if ( _vecToXYPlane ( nlt, flt, hits [ nHits ])) ++nHits;
	if ( _vecToXYPlane ( nrt, frt, hits [ nHits ])) ++nHits;
	if ( _vecToXYPlane ( nrb, frb, hits [ nHits ])) ++nHits;
	if ( _vecToXYPlane ( nlb, flb, hits [ nHits ])) ++nHits;
	
	if ( _vecToXYPlane ( nlt, nrt, hits [ nHits ])) ++nHits;
	if ( _vecToXYPlane ( nrt, nrb, hits [ nHits ])) ++nHits;
	if ( _vecToXYPlane ( nrb, nlb, hits [ nHits ])) ++nHits;
	if ( _vecToXYPlane ( nlb, nlt, hits [ nHits ])) ++nHits;
	
	if ( _vecToXYPlane ( flt, frt, hits [ nHits ])) ++nHits;
	if ( _vecToXYPlane ( frt, frb, hits [ nHits ])) ++nHits;
	if ( _vecToXYPlane ( frb, flb, hits [ nHits ])) ++nHits;
	if ( _vecToXYPlane ( flb, flt, hits [ nHits ])) ++nHits;
	
	if ( nHits ) {
		rect.Init ( hits [ 0 ]);
		for ( u32 i = 1; i < nHits; ++i ) {
			rect.Grow ( hits [ i ]);
		}
		return true;
	}
	return false;
}

//----------------------------------------------------------------//
USBox MOAISurfaceDeck2D::ComputeMaxBounds () {
	
	u32 size = this->mBrushes.Size ();

	USRect rect;
	rect.Init ( 0.0f, 0.0f, 0.0f, 0.0f );

	for ( u32 i = 0; i < size; ++i ) {
		rect.Grow ( this->mBrushes [ i ].mBounds );
	}

	USBox bounds;
	bounds.Init ( rect.mXMin, rect.mYMax, rect.mXMax, rect.mYMin, 0.0f, 0.0f );	
	return bounds;
}

//----------------------------------------------------------------//
USRect MOAIGfxQuadDeck2D::GetBounds ( u32 idx, MOAIDeckRemapper* remapper ) {
	
	u32 size = this->mQuads.Size ();
	if ( size ) {

		idx = remapper ? remapper->Remap ( idx ) : idx;
		idx = ( idx - 1 ) % size;
	
		MOAIQuadBrush& quad = this->mQuads [ idx ];
		return quad.GetVtxBounds ();
	}
	USRect rect;
	rect.Init ( 0.0f, 0.0f, 0.0f, 0.0f );
	return rect;
}

//----------------------------------------------------------------//
USRect MOAIGlyph::GetRect ( float x, float y ) const {

    USRect rect;

    x += ( this->mBearingX );
    y -= ( this->mBearingY );

    rect.Init (
        x,
        y,
        x + this->mWidth,
        y + this->mHeight
    );

    return rect;
}

//----------------------------------------------------------------//
USRect MOAIScissorRect::GetScissorRect ( const USMatrix4x4& worldToWndMtx ) const {

	USVec3D vtx3D [ 4 ];

	vtx3D [ 0 ].mX = this->mRect.mXMin;
	vtx3D [ 0 ].mY = this->mRect.mYMin;
	vtx3D [ 0 ].mZ = 0.0f;

	vtx3D [ 1 ].mX = this->mRect.mXMin;
	vtx3D [ 1 ].mY = this->mRect.mYMax;
	vtx3D [ 1 ].mZ = 0.0f;
	
	vtx3D [ 2 ].mX = this->mRect.mXMax;
	vtx3D [ 2 ].mY = this->mRect.mYMax;
	vtx3D [ 2 ].mZ = 0.0f;

	vtx3D [ 3 ].mX = this->mRect.mXMax;
	vtx3D [ 3 ].mY = this->mRect.mYMin;
	vtx3D [ 3 ].mZ = 0.0f;

	USMatrix4x4 mtx;
	
	mtx.Init ( this->GetLocalToWorldMtx ());
	mtx.Append ( worldToWndMtx );
	
	mtx.Project ( vtx3D [ 0 ]);
	mtx.Project ( vtx3D [ 1 ]);
	mtx.Project ( vtx3D [ 2 ]);
	mtx.Project ( vtx3D [ 3 ]);
	
	USRect scissorRect;

	scissorRect.Init ( vtx3D [ 0 ]);
	scissorRect.Grow ( vtx3D [ 1 ]);
	scissorRect.Grow ( vtx3D [ 2 ]);
	scissorRect.Grow ( vtx3D [ 3 ]);

	if ( this->mScissorRect ) {
		USRect parentRect = this->mScissorRect->GetScissorRect ( worldToWndMtx );
		parentRect.Clip ( scissorRect );
	}

	return scissorRect;
}