C++ View::GetViewMatrix方法代码示例

void RotateManipulator::testSelect (const View& view, const Matrix4& pivot2world)
{
    m_pivot.update(pivot2world, view.GetModelview(), view.GetProjection(), view.GetViewport());
    updateCircleTransforms();

    SelectionPool selector;

    {
        {
            Matrix4 local2view(matrix4_multiplied_by_matrix4(view.GetViewMatrix(), m_local2world_x));

            SelectionIntersection best;
            LineStrip_BestPoint(local2view, m_circle_x.m_vertices.data(), m_circle_x.m_vertices.size(), best);
            selector.addSelectable(best, &m_selectable_x);
        }

        {
            Matrix4 local2view(matrix4_multiplied_by_matrix4(view.GetViewMatrix(), m_local2world_y));

            SelectionIntersection best;
            LineStrip_BestPoint(local2view, m_circle_y.m_vertices.data(), m_circle_y.m_vertices.size(), best);
            selector.addSelectable(best, &m_selectable_y);
        }

        {
            Matrix4 local2view(matrix4_multiplied_by_matrix4(view.GetViewMatrix(), m_local2world_z));

            SelectionIntersection best;
            LineStrip_BestPoint(local2view, m_circle_z.m_vertices.data(), m_circle_z.m_vertices.size(), best);
            selector.addSelectable(best, &m_selectable_z);
        }
    }

    {
        Matrix4 local2view(matrix4_multiplied_by_matrix4(view.GetViewMatrix(), m_pivot.m_viewpointSpace));

        {
            SelectionIntersection best;
            LineLoop_BestPoint(local2view, m_circle_screen.m_vertices.data(), m_circle_screen.m_vertices.size(), best);
            selector.addSelectable(best, &m_selectable_screen);
        }

        {
            SelectionIntersection best;
            Circle_BestPoint(local2view, eClipCullCW, m_circle_sphere.m_vertices.data(),
                             m_circle_sphere.m_vertices.size(), best);
            selector.addSelectable(best, &m_selectable_sphere);
        }
    }

    m_axis_screen = m_pivot.m_axis_screen;

    if (!selector.failed()) {
        (*selector.begin()).second->setSelected(true);
    }
}

void TranslateManipulator::testSelect(const View& view, const Matrix4& pivot2world) {
    _pivot.update(pivot2world, view.GetModelview(), view.GetProjection(), view.GetViewport());

    SelectionPool selector;

    Vector3 x = _pivot._worldSpace.x().getVector3().getNormalised();
    bool show_x = manipulator_show_axis(_pivot, x);

    Vector3 y = _pivot._worldSpace.y().getVector3().getNormalised();
    bool show_y = manipulator_show_axis(_pivot, y);

    Vector3 z = _pivot._worldSpace.z().getVector3().getNormalised();
    bool show_z = manipulator_show_axis(_pivot, z);

    {
		Matrix4 local2view(view.GetViewMatrix().getMultipliedBy(_pivot._viewpointSpace));

      {
        SelectionIntersection best;
        Quad_BestPoint(local2view, eClipCullCW, &_quadScreen.front(), best);
        if(best.valid())
        {
          best = SelectionIntersection(0, 0);
          selector.addSelectable(best, &_selectableScreen);
        }
      }
    }

    {
		Matrix4 local2view(view.GetViewMatrix().getMultipliedBy(_pivot._worldSpace));

      if(show_x)
      {
        SelectionIntersection best;
        Line_BestPoint(local2view, &_arrowX.front(), best);
        Triangles_BestPoint(local2view, eClipCullCW, &_arrowHeadX._vertices.front(), &*(_arrowHeadX._vertices.end()-1)+1, best);
        selector.addSelectable(best, &_selectableX);
      }

      if(show_y)
      {
        SelectionIntersection best;
        Line_BestPoint(local2view, &_arrowY.front(), best);
        Triangles_BestPoint(local2view, eClipCullCW, &_arrowHeadY._vertices.front(), &*(_arrowHeadY._vertices.end()-1)+1, best);
        selector.addSelectable(best, &_selectableY);
      }

      if(show_z)
      {
        SelectionIntersection best;
        Line_BestPoint(local2view, &_arrowZ.front(), best);
        Triangles_BestPoint(local2view, eClipCullCW, &_arrowHeadZ._vertices.front(), &*(_arrowHeadZ._vertices.end()-1)+1, best);
        selector.addSelectable(best, &_selectableZ);
      }
    }

	// greebo: If any of the above arrows could be selected, select the first in the SelectionPool
    if(!selector.failed()) {
      (*selector.begin()).second->setSelected(true);
    } else {
    	Selectable* selectable = NULL;

    	if (registry::getValue<bool>(RKEY_TRANSLATE_CONSTRAINED)) {
	    	// None of the shown arrows (or quad) has been selected, select an axis based on the precedence
	    	Matrix4 local2view(view.GetViewMatrix().getMultipliedBy(_pivot._worldSpace));

	    	// Get the (relative?) distance from the mouse pointer to the manipulator
	    	Vector3 delta = local2view.t().getProjected();

	    	// Get the precedence (which axis has the absolute largest value in it)
	    	bool xGreaterY = (fabs(delta.x()) > fabs(delta.y()));

	    	// The precedence has to be interpreted according to which axes are visible
	    	if (show_z) {
	    		// Either XZ or YZ
	    		if (show_y) {
	    			// YZ
	    			selectable = (xGreaterY) ? &_selectableY : &_selectableZ;
	    		}
	    		else {
	    			// XZ
	    			selectable = (xGreaterY) ? &_selectableX : &_selectableZ;
	    		}
	    	}
	    	else {
	    		// XY
	    		selectable = (xGreaterY) ? &_selectableX : &_selectableY;
	    	}
    	}
    	else {
    		// Don't constrain to axis, choose the freemove translator
    		selectable = &_selectableScreen;
    	}

		// If everything went ok, there is a selectable available, add it
    	if (selectable != NULL) {
    		selector.addSelectable(SelectionIntersection(0,0), selectable);
    		selectable->setSelected(true);
    	}
    }
//.........这里部分代码省略.........