--- a/src/canvas.cpp Thu Feb 09 13:17:22 2017 +0200
+++ b/src/canvas.cpp Thu Feb 09 13:26:44 2017 +0200
@@ -19,9 +19,11 @@
#include <QMouseEvent>
#include "canvas.h"
#include "documentmanager.h"
+#include "grid.h"
#include "ldDocument.h"
#include "mainwindow.h"
#include "messageLog.h"
+#include "miscallenous.h"
#include "primitives.h"
Canvas::Canvas(LDDocument* document, QWidget* parent) :
@@ -204,3 +206,107 @@
linepen.setColor(luma(backgroundColor()) < 40 ? Qt::white : Qt::black);
return linepen;
}
+
+
+int Canvas::depthNegateFactor() const
+{
+ return cameraInfo(camera()).negatedDepth ? -1 : 1;
+}
+
+// =============================================================================
+//
+void Canvas::getRelativeAxes(Axis& relativeX, Axis& relativeY) const
+{
+ const CameraInfo& camera = cameraInfo(this->camera());
+ relativeX = camera.localX;
+ relativeY = camera.localY;
+}
+
+// =============================================================================
+//
+Axis Canvas::getRelativeZ() const
+{
+ const CameraInfo& camera = cameraInfo(this->camera());
+ return static_cast<Axis>(3 - camera.localX - camera.localY);
+}
+
+// =============================================================================
+//
+void Canvas::setDepthValue (double depth)
+{
+ if (camera() < FreeCamera)
+ m_depthValues[camera()] = depth;
+}
+
+// =============================================================================
+//
+double Canvas::getDepthValue() const
+{
+ if (camera() < FreeCamera)
+ return m_depthValues[camera()];
+ else
+ return 0.0;
+}
+
+/*
+ * This converts a 2D point on the screen to a 3D point in the model. If 'snap' is true, the 3D point will snap to the current grid.
+ */
+Vertex Canvas::convert2dTo3d(const QPoint& position2d, bool snap) const
+{
+ if (camera() == FreeCamera)
+ {
+ return {0, 0, 0};
+ }
+ else
+ {
+ Vertex position3d;
+ const CameraInfo& camera = cameraInfo(this->camera());
+ Axis axisX = camera.localX;
+ Axis axisY = camera.localY;
+ int signX = camera.negatedX ? -1 : 1;
+ int signY = camera.negatedY ? -1 : 1;
+
+ // Calculate cx and cy - these are the LDraw unit coords the cursor is at.
+ double cx = (-virtualWidth() + ((2 * position2d.x() * virtualWidth()) / width()) - panning(X));
+ double cy = (virtualHeight() - ((2 * position2d.y() * virtualHeight()) / height()) - panning(Y));
+
+ if (snap)
+ {
+ cx = grid()->snap(cx, Grid::Coordinate);
+ cy = grid()->snap(cy, Grid::Coordinate);
+ }
+
+ cx *= signX;
+ cy *= signY;
+ roundToDecimals(cx, 4);
+ roundToDecimals(cy, 4);
+
+ // Create the vertex from the coordinates
+ position3d.setCoordinate(axisX, cx);
+ position3d.setCoordinate(axisY, cy);
+ position3d.setCoordinate(static_cast<Axis>(3 - axisX - axisY), getDepthValue());
+ return position3d;
+ }
+}
+
+/*
+ * Inverse operation for the above - convert a 3D position to a 2D screen position.
+ */
+QPoint Canvas::convert3dTo2d(const Vertex& position3d) const
+{
+ if (camera() == FreeCamera)
+ {
+ return {0, 0};
+ }
+ else
+ {
+ const CameraInfo& camera = cameraInfo(this->camera());
+ Axis axisX = camera.localX;
+ Axis axisY = camera.localY;
+ int signX = camera.negatedX ? -1 : 1;
+ int signY = camera.negatedY ? -1 : 1;
+ int rx = (((position3d[axisX] * signX) + virtualWidth() + panning(X)) * width()) / (2 * virtualWidth());
+ int ry = (((position3d[axisY] * signY) - virtualHeight() + panning(Y)) * height()) / (2 * virtualHeight());
+ return {rx, -ry};
+ }
+}
\ No newline at end of file