//----------------------------------------------------------------// void USPrism::Transform ( const USMatrix4x4& mtx ) { mtx.Transform ( mLoc ); mtx.TransformVec ( mXAxis ); mtx.TransformVec ( mYAxis ); mtx.TransformVec ( mZAxis ); }
//----------------------------------------------------------------// void MOAIDraw::DrawRay ( float x, float y, float dx, float dy ) { USVec2D loc ( x, y ); USVec2D vec ( dx, dy ); USMatrix4x4 mtx = MOAIGfxDevice::Get ().GetViewProjMtx (); USMatrix4x4 invMtx; invMtx.Inverse ( mtx ); mtx.Transform ( loc ); mtx.TransformVec ( vec ); USRect 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 ( GL_LINES ); gfxDevice.WriteVtx ( p0.mX, p0.mY, 0.0f ); gfxDevice.WriteFinalColor4b (); gfxDevice.WriteVtx ( p1.mX, p1.mY, 0.0f ); gfxDevice.WriteFinalColor4b (); gfxDevice.EndPrim (); } }
//----------------------------------------------------------------// void MOAIDraw::DrawAxisGrid ( USVec2D loc, USVec2D vec, float size ) { USMatrix4x4 mtx = MOAIGfxDevice::Get ().GetViewProjMtx (); USMatrix4x4 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 USRect 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 ); } }