1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/skia/trunk/include/utils/SkCamera.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,153 @@
1.4 +/*
1.5 + * Copyright 2006 The Android Open Source Project
1.6 + *
1.7 + * Use of this source code is governed by a BSD-style license that can be
1.8 + * found in the LICENSE file.
1.9 + */
1.10 +
1.11 +// Inspired by Rob Johnson's most excellent QuickDraw GX sample code
1.12 +
1.13 +#ifndef SkCamera_DEFINED
1.14 +#define SkCamera_DEFINED
1.15 +
1.16 +#include "SkMatrix.h"
1.17 +
1.18 +class SkCanvas;
1.19 +
1.20 +struct SkUnit3D {
1.21 + SkScalar fX, fY, fZ;
1.22 +
1.23 + void set(SkScalar x, SkScalar y, SkScalar z) {
1.24 + fX = x; fY = y; fZ = z;
1.25 + }
1.26 + static SkScalar Dot(const SkUnit3D&, const SkUnit3D&);
1.27 + static void Cross(const SkUnit3D&, const SkUnit3D&, SkUnit3D* cross);
1.28 +};
1.29 +
1.30 +struct SkPoint3D {
1.31 + SkScalar fX, fY, fZ;
1.32 +
1.33 + void set(SkScalar x, SkScalar y, SkScalar z) {
1.34 + fX = x; fY = y; fZ = z;
1.35 + }
1.36 + SkScalar normalize(SkUnit3D*) const;
1.37 +};
1.38 +typedef SkPoint3D SkVector3D;
1.39 +
1.40 +struct SkMatrix3D {
1.41 + SkScalar fMat[3][4];
1.42 +
1.43 + void reset();
1.44 +
1.45 + void setRow(int row, SkScalar a, SkScalar b, SkScalar c, SkScalar d = 0) {
1.46 + SkASSERT((unsigned)row < 3);
1.47 + fMat[row][0] = a;
1.48 + fMat[row][1] = b;
1.49 + fMat[row][2] = c;
1.50 + fMat[row][3] = d;
1.51 + }
1.52 +
1.53 + void setRotateX(SkScalar deg);
1.54 + void setRotateY(SkScalar deg);
1.55 + void setRotateZ(SkScalar deg);
1.56 + void setTranslate(SkScalar x, SkScalar y, SkScalar z);
1.57 +
1.58 + void preRotateX(SkScalar deg);
1.59 + void preRotateY(SkScalar deg);
1.60 + void preRotateZ(SkScalar deg);
1.61 + void preTranslate(SkScalar x, SkScalar y, SkScalar z);
1.62 +
1.63 + void setConcat(const SkMatrix3D& a, const SkMatrix3D& b);
1.64 + void mapPoint(const SkPoint3D& src, SkPoint3D* dst) const;
1.65 + void mapVector(const SkVector3D& src, SkVector3D* dst) const;
1.66 +
1.67 + void mapPoint(SkPoint3D* v) const {
1.68 + this->mapPoint(*v, v);
1.69 + }
1.70 +
1.71 + void mapVector(SkVector3D* v) const {
1.72 + this->mapVector(*v, v);
1.73 + }
1.74 +};
1.75 +
1.76 +class SkPatch3D {
1.77 +public:
1.78 + SkPatch3D();
1.79 +
1.80 + void reset();
1.81 + void transform(const SkMatrix3D&, SkPatch3D* dst = NULL) const;
1.82 +
1.83 + // dot a unit vector with the patch's normal
1.84 + SkScalar dotWith(SkScalar dx, SkScalar dy, SkScalar dz) const;
1.85 + SkScalar dotWith(const SkVector3D& v) const {
1.86 + return this->dotWith(v.fX, v.fY, v.fZ);
1.87 + }
1.88 +
1.89 + // deprecated, but still here for animator (for now)
1.90 + void rotate(SkScalar x, SkScalar y, SkScalar z) {}
1.91 + void rotateDegrees(SkScalar x, SkScalar y, SkScalar z) {}
1.92 +
1.93 +private:
1.94 +public: // make public for SkDraw3D for now
1.95 + SkVector3D fU, fV;
1.96 + SkPoint3D fOrigin;
1.97 +
1.98 + friend class SkCamera3D;
1.99 +};
1.100 +
1.101 +class SkCamera3D {
1.102 +public:
1.103 + SkCamera3D();
1.104 +
1.105 + void reset();
1.106 + void update();
1.107 + void patchToMatrix(const SkPatch3D&, SkMatrix* matrix) const;
1.108 +
1.109 + SkPoint3D fLocation;
1.110 + SkPoint3D fAxis;
1.111 + SkPoint3D fZenith;
1.112 + SkPoint3D fObserver;
1.113 +
1.114 +private:
1.115 + mutable SkMatrix fOrientation;
1.116 + mutable bool fNeedToUpdate;
1.117 +
1.118 + void doUpdate() const;
1.119 +};
1.120 +
1.121 +class Sk3DView : SkNoncopyable {
1.122 +public:
1.123 + Sk3DView();
1.124 + ~Sk3DView();
1.125 +
1.126 + void save();
1.127 + void restore();
1.128 +
1.129 + void translate(SkScalar x, SkScalar y, SkScalar z);
1.130 + void rotateX(SkScalar deg);
1.131 + void rotateY(SkScalar deg);
1.132 + void rotateZ(SkScalar deg);
1.133 +
1.134 +#ifdef SK_BUILD_FOR_ANDROID
1.135 + void setCameraLocation(SkScalar x, SkScalar y, SkScalar z);
1.136 + SkScalar getCameraLocationX();
1.137 + SkScalar getCameraLocationY();
1.138 + SkScalar getCameraLocationZ();
1.139 +#endif
1.140 +
1.141 + void getMatrix(SkMatrix*) const;
1.142 + void applyToCanvas(SkCanvas*) const;
1.143 +
1.144 + SkScalar dotWithNormal(SkScalar dx, SkScalar dy, SkScalar dz) const;
1.145 +
1.146 +private:
1.147 + struct Rec {
1.148 + Rec* fNext;
1.149 + SkMatrix3D fMatrix;
1.150 + };
1.151 + Rec* fRec;
1.152 + Rec fInitialRec;
1.153 + SkCamera3D fCamera;
1.154 +};
1.155 +
1.156 +#endif
