Better selection boxes. Closes #914, #295, #810.

This was SVN commit r10593.
2011-11-25 06:36:13 +00:00
parent 9e97c73544
commit 85186c98b2
58 changed files with 1315 additions and 205 deletions
@@ -0,0 +1,92 @@
+/* Copyright (C) 2011 Wildfire Games.
+ * This file is part of 0 A.D.
+ *
+ * 0 A.D. is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 0 A.D. is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with 0 A.D.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "precompiled.h"
+
+#include "ModelAbstract.h"
+
+#include "ps/CLogger.h"
+
+const CBoundingBoxOriented& CModelAbstract::GetSelectionBox()
+{
+	if (!m_SelectionBoxValid)
+	{
+		CalcSelectionBox();
+		m_SelectionBoxValid = true;
+	}
+	return m_SelectionBox;
+}
+
+void CModelAbstract::CalcSelectionBox()
+{
+	if (m_CustomSelectionShape)
+	{
+		// custom shape
+		switch(m_CustomSelectionShape->m_Type)
+		{
+		case CustomSelectionShape::BOX:
+			{
+				// create object-space bounds according to the information in the descriptor, and transform them to world-space.
+				// the box is centered on the X and Z axes, but extends from 0 to its height on the Y axis.
+				const float width = m_CustomSelectionShape->m_Size0;
+				const float depth = m_CustomSelectionShape->m_Size1;
+				const float height = m_CustomSelectionShape->m_Height;
+
+				CBoundingBoxAligned bounds;
+				bounds += CVector3D(-width/2.f, 0,     -depth/2.f);
+				bounds += CVector3D( width/2.f, height, depth/2.f);
+
+				bounds.Transform(GetTransform(), m_SelectionBox);
+			}
+			break;
+		case CustomSelectionShape::CYLINDER:
+			{
+				// TODO: unimplemented
+				m_SelectionBox.SetEmpty();
+				LOGWARNING(L"[ModelAbstract] TODO: Cylinder selection boxes are not yet implemented. Use BOX or BOUNDS selection shapes instead.");
+			}
+			break;
+		default:
+			{
+				m_SelectionBox.SetEmpty();
+				//LOGWARNING(L"[ModelAbstract] Unrecognized selection shape type: %ld", m_CustomSelectionShape->m_Type);
+				debug_warn("[ModelAbstract] Unrecognized selection shape type");
+			}
+			break;
+		}
+	}
+	else
+	{
+		// standard method
+
+		// Get the object-space bounds that should be used to construct this model (and its children)'s selection box
+		CBoundingBoxAligned objBounds = GetObjectSelectionBoundsRec();
+		if (objBounds.IsEmpty())
+		{
+			m_SelectionBox.SetEmpty(); // model does not wish to participate in selection
+			return;
+		}
+
+		// Prevent the bounding box from extending through the terrain; clip the lower plane at Y=0 in object space.
+		if (objBounds[1].Y > 0.f) // should always be the case, unless the models are defined really weirdly
+			objBounds[0].Y = std::max(0.f, objBounds[0].Y);
+
+		// transform object-space axis-aligned bounds to world-space arbitrary-aligned box
+		objBounds.Transform(GetTransform(), m_SelectionBox);
+	}
+	
+}