C4Shape.h

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/*
 * OpenClonk, http://www.openclonk.org
 *
 * Copyright (c) 1998-2000, Matthes Bender
 * Copyright (c) 2001-2009, RedWolf Design GmbH, http://www.clonk.de/
 * Copyright (c) 2009-2016, The OpenClonk Team and contributors
 *
 * Distributed under the terms of the ISC license; see accompanying file
 * "COPYING" for details.
 *
 * "Clonk" is a registered trademark of Matthes Bender, used with permission.
 * See accompanying file "TRADEMARK" for details.
 *
 * To redistribute this file separately, substitute the full license texts
 * for the above references.
 */
 
/* Basic classes for rectangles and vertex outlines */
 
#ifndef INC_C4Shape
#define INC_C4Shape
 
#include "config/C4Constants.h"
#include "lib/C4Rect.h"
 
#define C4D_VertexCpyPos (C4D_MaxVertex/2)
 
// a functional class to provide density for coordinates
class C4DensityProvider
{
public:
    virtual int32_t GetDensity(int32_t x, int32_t y) const;
    virtual ~C4DensityProvider() = default;
};
 
extern C4DensityProvider DefaultDensityProvider;
 
class C4Shape : public C4Rect
{
public:
    // remember to adjust C4Shape::CopyFrom and CreateOwnOriginalCopy when adding members here!
    int32_t VtxNum = 0;
    int32_t VtxX[C4D_MaxVertex] = { 0 };
    int32_t VtxY[C4D_MaxVertex] = { 0 };
    int32_t VtxCNAT[C4D_MaxVertex] = { 0 };
    int32_t VtxFriction[C4D_MaxVertex] = { 0 };
    int32_t ContactDensity = C4M_Solid;
    int32_t ContactCNAT = 0;
    int32_t ContactCount = 0;
    int32_t AttachMat = MNone;
    int32_t VtxContactCNAT[C4D_MaxVertex] = { 0 };
    int32_t VtxContactMat[C4D_MaxVertex] = { 0 };
    int32_t iAttachX = 0, iAttachY = 0, iAttachVtx = 0;
public:
    void Default();
    void Rotate(C4Real Angle, bool bUpdateVertices);
    void Stretch(int32_t iCon, bool bUpdateVertices);
    void Jolt(int32_t iCon, bool bUpdateVertices);
    void GetVertexOutline(C4Rect &rRect);
    int32_t GetVertexY(int32_t iVertex);
    int32_t GetVertexX(int32_t iVertex);
    int32_t GetX() const { return x; }
    int32_t GetY() const { return y; }
    bool AddVertex(int32_t iX, int32_t iY);
    bool CheckContact(int32_t cx, int32_t cy);
    bool ContactCheck(int32_t cx, int32_t cy, uint32_t *border_hack_contacts=nullptr, bool collide_halfvehic=false);
    bool Attach(int32_t &cx, int32_t &cy, BYTE cnat_pos);
    bool LineConnect(int32_t tx, int32_t ty, int32_t cvtx, int32_t ld, int32_t oldx, int32_t oldy);
    bool InsertVertex(int32_t iPos, int32_t tx, int32_t ty);
    bool RemoveVertex(int32_t iPos);
    void CopyFrom(C4Shape rFrom, bool bCpyVertices, bool fCopyVerticesFromSelf);
    int32_t GetBottomVertex();
    int GetBottom(); // return lowest vertex Y
    int32_t GetVertexContact(int32_t iVtx, DWORD dwCheckMask, int32_t tx, int32_t ty, const C4DensityProvider &rDensityProvider = DefaultDensityProvider); // get CNAT-mask for given vertex - does not check range for iVtx!
    bool CheckScaleToWalk(int x, int y);
    void CreateOwnOriginalCopy(C4Shape &rFrom); // create copy of all vertex members in back area of own buffers
    void CompileFunc(StdCompiler *pComp, const C4Shape *default_shape);
private:
    bool CheckTouchableMaterial(int32_t x, int32_t y, int32_t vtx_i, int32_t y_dir = 0, const C4DensityProvider &rDensityProvider = DefaultDensityProvider);
};
 
#endif // INC_C4Shape