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engines/hpl1/engine/graphics/Mesh2d.h

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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+/*
+ * Copyright (C) 2006-2010 - Frictional Games
+ *
+ * This file is part of HPL1 Engine.
+ */
+
+#ifndef HPL_MESH2D_H
+#define HPL_MESH2D_H
+
+#include "common/array.h"
+#include "hpl1/engine/graphics/GraphicsTypes.h"
+#include "hpl1/engine/math/MathTypes.h"
+#include "hpl1/engine/system/SystemTypes.h"
+
+namespace hpl {
+class cMesh2DEdge {
+public:
+	cMesh2DEdge(cVector2f avNormal, cVector2f avMidPos, unsigned int alStartIndex, unsigned int alEndIndex)
+		: mvNormal(avNormal), mvMidPos(avMidPos), mlStartIndex(alStartIndex), mlEndIndex(alEndIndex) {}
+
+	cVector2f mvNormal;
+	cVector2f mvMidPos;
+	unsigned int mlStartIndex;
+	unsigned int mlEndIndex;
+};
+
+typedef Common::Array<cMesh2DEdge> tMesh2DEdgeVec;
+typedef tMesh2DEdgeVec::iterator tMesh2DEdgeVecIt;
+
+class cCollisionMesh2D {
+public:
+	cCollisionMesh2D() {}
+
+	tVector2fVec mvPos;
+	tVector2fVec mvNormal;
+};
+
+/** Mesh2D is stores meshes used by 2d objects for collision and drawing.
+@remarks
+The main objects in the class is the vertex list, the edge list, the index list and the
+edge index list. The edge list is a list calculated by the app it self, it contain normals
+for all edges in the vertex list. When the vertexes are defined this must be
+in a clockwise order in the edge index list! The Z value in the vertex doesn't matter. The indexes
+point to the vertex list.
+@see
+*/
+class cMesh2D {
+public:
+	cMesh2D();
+	~cMesh2D();
+
+	void AddVertex(cVector2f avPos, cVector2f avTexCoord = 0, cColor aCol = 1);
+	void AddIndex(unsigned int alIndex);
+	void AddEdgeIndex(unsigned int alIndex);
+
+	void CreateVertexVec();
+	void CreateTileVertexVec();
+
+	tVertexVec *GetVertexVec(const cRect2f &aImageRect, cVector2f avSize, eTileRotation aRotation = eTileRotation_0);
+	tUIntVec *GetIndexVec();
+	tMesh2DEdgeVec *GetEdgeVec(eTileRotation aRotation = eTileRotation_0);
+
+	/**
+	 * Checks if a point is inside the mesh. Only works on convex edge meshes.
+	 * \param avPoint
+	 * \param avMeshPos
+	 * \param aRotation
+	 * \return
+	 */
+	bool PointIsInside(const cVector2f &avPoint, const cVector2f &avMeshPos,
+					   eTileRotation aRotation = eTileRotation_0);
+
+	cCollisionMesh2D *CreateCollisonMesh(const cVector2f &avPos, const cVector2f &avSizeMul,
+										 eTileRotation aRotation = eTileRotation_0);
+
+private:
+	tVector2fVec mvPos;
+	tColorVec mvColor;
+	tMesh2DEdgeVec mvEdge[eTileRotation_LastEnum];
+	tVector2fVec mvTexCoord;
+	tUIntVec mvIndex;
+	tUIntVec mvEdgeIndex;
+	cRect2f mvBoundingBox[eTileRotation_LastEnum];
+
+	tVertexVec mvVtx[eTileRotation_LastEnum]; // One for each tile angle.
+
+	void CalculateEdges(eTileRotation aRotation, tVertexVec &aVtx, tUIntVec &aIdx);
+};
+
+} // namespace hpl
+
+#endif // HPL_MESH2D_H