コード例 #1
0
//----------------------------------------------------------------//
ZLRect MOAIQuadBrush::GetVtxBounds () {

	ZLRect rect;
	
	rect.Init ( this->mModelQuad.mV [ 0 ]);
	rect.Grow ( this->mModelQuad.mV [ 1 ]);
	rect.Grow ( this->mModelQuad.mV [ 2 ]);
	rect.Grow ( this->mModelQuad.mV [ 3 ]);
	
	return rect;
}
コード例 #2
0
//----------------------------------------------------------------//
bool ZLFrustum::GetXYSectRect ( const ZLAffine3D& mtx, ZLRect& rect ) const {

	u32 nHits = 0;
	ZLVec2D hits [ 12 ];

	ZLVec3D nlt = this->mPoints [ NEAR_LT_POINT ];
	ZLVec3D nrt = this->mPoints [ NEAR_RT_POINT ];
	ZLVec3D nrb = this->mPoints [ NEAR_RB_POINT ];
	ZLVec3D nlb = this->mPoints [ NEAR_LB_POINT ];
	
	ZLVec3D flt = this->mPoints [ FAR_LT_POINT ];
	ZLVec3D frt = this->mPoints [ FAR_RT_POINT ];
	ZLVec3D frb = this->mPoints [ FAR_RB_POINT ];
	ZLVec3D 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;
}
コード例 #3
0
ファイル: MOAIScissorRect.cpp プロジェクト: Chenhx/moai-dev
//----------------------------------------------------------------//
ZLRect MOAIScissorRect::GetScissorRect ( const ZLMatrix4x4& worldToWndMtx ) const {

	ZLVec3D 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;

	ZLMatrix4x4 mtx;
	
	mtx.Init ( this->GetLocalToWorldMtx ());
	mtx.Append ( worldToWndMtx );
	
	mtx.Project ( vtx3D [ 0 ]);
	mtx.Project ( vtx3D [ 1 ]);
	mtx.Project ( vtx3D [ 2 ]);
	mtx.Project ( vtx3D [ 3 ]);
	
	ZLRect scissorRect;

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

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

	return scissorRect;
}
コード例 #4
0
//----------------------------------------------------------------//
void MOAIDraw::DrawRay ( float x, float y, float dx, float dy ) {
	
	USVec2D loc ( x, y );
	USVec2D vec ( dx, dy );
	
	ZLMatrix4x4 mtx = MOAIGfxDevice::Get ().GetViewProjMtx ();
	
	ZLMatrix4x4 invMtx;
	invMtx.Inverse ( mtx );
	
	mtx.Transform ( loc );
	mtx.TransformVec ( vec );
	
	ZLRect viewRect;
	viewRect.Init ( -1.0f, -1.0f, 1.0f, 1.0f );
	
	USVec2D p0;
	USVec2D p1;
	
	if ( viewRect.GetIntersection ( loc, vec, p0, p1 )) {
		
		invMtx.Transform ( p0 );
		invMtx.Transform ( p1 );
		
		MOAIGfxDevice& gfxDevice = MOAIGfxDevice::Get ();
		
		gfxDevice.BeginPrim ( ZGL_PRIM_LINES );
		
			gfxDevice.WriteVtx ( p0.mX, p0.mY, 0.0f );
			gfxDevice.WriteFinalColor4b ();
			
			gfxDevice.WriteVtx ( p1.mX, p1.mY, 0.0f );
			gfxDevice.WriteFinalColor4b ();

		gfxDevice.EndPrim ();
	}
}
コード例 #5
0
//----------------------------------------------------------------//
void MOAIDraw::DrawAxisGrid ( USVec2D loc, USVec2D vec, float size ) {

	ZLMatrix4x4 mtx = MOAIGfxDevice::Get ().GetViewProjMtx ();
	
	ZLMatrix4x4 invMtx;
	invMtx.Inverse ( mtx );
	
	// Set the axis to the grid length so we can get the length back post-transform
	vec.SetLength ( size );
	
	mtx.Transform ( loc );
	mtx.TransformVec ( vec );

	// Get the axis unit vector
	USVec2D norm = vec;
	size = norm.NormSafe ();
	
	// Get the axis normal
	USVec2D perpNorm ( norm.mY, -norm.mX );
	
	// Project the corners of the viewport onto the axis to get the mix/max bounds
	float dot;
	float min;
	float max;
	
	USVec2D corner;
	
	// left, top
	corner.Init ( -1.0f, 1.0f );
	corner.Sub ( loc );
	dot = norm.Dot ( corner );
	
	min = dot;
	max = dot;
	
	// right, top
	corner.Init ( 1.0f, 1.0f );
	corner.Sub ( loc );
	dot = norm.Dot ( corner );
	
	min = ( dot < min ) ? dot : min;
	max = ( dot > max ) ? dot : max;
	
	// right, bottom
	corner.Init ( 1.0f, -1.0f );
	corner.Sub ( loc );
	dot = norm.Dot ( corner );
	
	min = ( dot < min ) ? dot : min;
	max = ( dot > max ) ? dot : max;
	
	// left, bottom
	corner.Init ( -1.0f, -1.0f );
	corner.Sub ( loc );
	dot = norm.Dot ( corner );
	
	min = ( dot < min ) ? dot : min;
	max = ( dot > max ) ? dot : max;
	
	// Get the start andstop grids
	s32 start = ( s32 )( min / size ) - 1;
	s32 stop = ( s32 )( max / size ) + 1;
	
	// Set the pen to the first...
	USVec2D pen = norm;
	pen.Scale (( float )start * size );
	pen.Add ( loc );
	
	// Step along the axis to draw perpendicular grid lines
	ZLRect viewRect;
	viewRect.Init ( -1.0f, -1.0f, 1.0f, 1.0f );
	
	for ( ; start < stop; ++start ) {
		
		USVec2D p0;
		USVec2D p1;
		
		if ( viewRect.GetIntersection ( pen, perpNorm, p0, p1 )) {
			
			invMtx.Transform ( p0 );
			invMtx.Transform ( p1 );
			
			MOAIDraw::DrawLine ( p0, p1 );
		}
		
		pen.Add ( vec );
	}
}