epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 1 | |
| 2 | /* |
| 3 | * Copyright 2006 The Android Open Source Project |
| 4 | * |
| 5 | * Use of this source code is governed by a BSD-style license that can be |
| 6 | * found in the LICENSE file. |
| 7 | */ |
| 8 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 9 | |
| 10 | #include "SkCamera.h" |
| 11 | |
| 12 | static SkScalar SkScalarDotDiv(int count, const SkScalar a[], int step_a, |
| 13 | const SkScalar b[], int step_b, |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 14 | SkScalar denom) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 15 | float prod = 0; |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 16 | for (int i = 0; i < count; i++) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 17 | prod += a[0] * b[0]; |
| 18 | a += step_a; |
| 19 | b += step_b; |
| 20 | } |
| 21 | return prod / denom; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 22 | } |
| 23 | |
| 24 | static SkScalar SkScalarDot(int count, const SkScalar a[], int step_a, |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 25 | const SkScalar b[], int step_b) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 26 | float prod = 0; |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 27 | for (int i = 0; i < count; i++) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 28 | prod += a[0] * b[0]; |
| 29 | a += step_a; |
| 30 | b += step_b; |
| 31 | } |
| 32 | return prod; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 33 | } |
| 34 | |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 35 | /////////////////////////////////////////////////////////////////////////////// |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 36 | |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 37 | SkUnitScalar SkPoint3D::normalize(SkUnit3D* unit) const { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 38 | float mag = sk_float_sqrt(fX*fX + fY*fY + fZ*fZ); |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 39 | if (mag) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 40 | float scale = 1.0f / mag; |
| 41 | unit->fX = fX * scale; |
| 42 | unit->fY = fY * scale; |
| 43 | unit->fZ = fZ * scale; |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 44 | } else { |
| 45 | unit->fX = unit->fY = unit->fZ = 0; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 46 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 47 | return mag; |
| 48 | } |
| 49 | |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 50 | SkUnitScalar SkUnit3D::Dot(const SkUnit3D& a, const SkUnit3D& b) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 51 | return SkUnitScalarMul(a.fX, b.fX) + |
| 52 | SkUnitScalarMul(a.fY, b.fY) + |
| 53 | SkUnitScalarMul(a.fZ, b.fZ); |
| 54 | } |
| 55 | |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 56 | void SkUnit3D::Cross(const SkUnit3D& a, const SkUnit3D& b, SkUnit3D* cross) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 57 | SkASSERT(cross); |
| 58 | |
| 59 | // use x,y,z, in case &a == cross or &b == cross |
| 60 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 61 | SkScalar x = SkUnitScalarMul(a.fY, b.fZ) - SkUnitScalarMul(a.fZ, b.fY); |
| 62 | SkScalar y = SkUnitScalarMul(a.fZ, b.fX) - SkUnitScalarMul(a.fX, b.fY); |
| 63 | SkScalar z = SkUnitScalarMul(a.fX, b.fY) - SkUnitScalarMul(a.fY, b.fX); |
| 64 | |
| 65 | cross->set(x, y, z); |
| 66 | } |
| 67 | |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 68 | /////////////////////////////////////////////////////////////////////////////// |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 69 | |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 70 | SkPatch3D::SkPatch3D() { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 71 | this->reset(); |
| 72 | } |
| 73 | |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 74 | void SkPatch3D::reset() { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 75 | fOrigin.set(0, 0, 0); |
| 76 | fU.set(SK_Scalar1, 0, 0); |
| 77 | fV.set(0, -SK_Scalar1, 0); |
| 78 | } |
| 79 | |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 80 | void SkPatch3D::transform(const SkMatrix3D& m, SkPatch3D* dst) const { |
| 81 | if (dst == NULL) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 82 | dst = (SkPatch3D*)this; |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 83 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 84 | m.mapVector(fU, &dst->fU); |
| 85 | m.mapVector(fV, &dst->fV); |
| 86 | m.mapPoint(fOrigin, &dst->fOrigin); |
| 87 | } |
| 88 | |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 89 | SkScalar SkPatch3D::dotWith(SkScalar dx, SkScalar dy, SkScalar dz) const { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 90 | SkScalar cx = SkScalarMul(fU.fY, fV.fZ) - SkScalarMul(fU.fZ, fV.fY); |
| 91 | SkScalar cy = SkScalarMul(fU.fZ, fV.fX) - SkScalarMul(fU.fX, fV.fY); |
| 92 | SkScalar cz = SkScalarMul(fU.fX, fV.fY) - SkScalarMul(fU.fY, fV.fX); |
| 93 | |
| 94 | return SkScalarMul(cx, dx) + SkScalarMul(cy, dy) + SkScalarMul(cz, dz); |
| 95 | } |
| 96 | |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 97 | /////////////////////////////////////////////////////////////////////////////// |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 98 | |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 99 | void SkMatrix3D::reset() { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 100 | memset(fMat, 0, sizeof(fMat)); |
| 101 | fMat[0][0] = fMat[1][1] = fMat[2][2] = SK_Scalar1; |
| 102 | } |
| 103 | |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 104 | void SkMatrix3D::setTranslate(SkScalar x, SkScalar y, SkScalar z) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 105 | memset(fMat, 0, sizeof(fMat)); |
| 106 | fMat[0][0] = x; |
| 107 | fMat[1][1] = y; |
| 108 | fMat[2][2] = z; |
| 109 | } |
| 110 | |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 111 | void SkMatrix3D::setRotateX(SkScalar degX) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 112 | SkScalar s, c; |
| 113 | |
| 114 | s = SkScalarSinCos(SkDegreesToRadians(degX), &c); |
| 115 | this->setRow(0, SK_Scalar1, 0, 0); |
| 116 | this->setRow(1, 0, c, -s); |
| 117 | this->setRow(2, 0, s, c); |
| 118 | } |
| 119 | |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 120 | void SkMatrix3D::setRotateY(SkScalar degY) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 121 | SkScalar s, c; |
| 122 | |
| 123 | s = SkScalarSinCos(SkDegreesToRadians(degY), &c); |
| 124 | this->setRow(0, c, 0, -s); |
| 125 | this->setRow(1, 0, SK_Scalar1, 0); |
| 126 | this->setRow(2, s, 0, c); |
| 127 | } |
| 128 | |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 129 | void SkMatrix3D::setRotateZ(SkScalar degZ) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 130 | SkScalar s, c; |
| 131 | |
| 132 | s = SkScalarSinCos(SkDegreesToRadians(degZ), &c); |
| 133 | this->setRow(0, c, -s, 0); |
| 134 | this->setRow(1, s, c, 0); |
| 135 | this->setRow(2, 0, 0, SK_Scalar1); |
| 136 | } |
| 137 | |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 138 | void SkMatrix3D::preTranslate(SkScalar x, SkScalar y, SkScalar z) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 139 | SkScalar col[3] = { x, y, z}; |
| 140 | |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 141 | for (int i = 0; i < 3; i++) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 142 | fMat[i][3] += SkScalarDot(3, &fMat[i][0], 1, col, 1); |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 143 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 144 | } |
| 145 | |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 146 | void SkMatrix3D::preRotateX(SkScalar degX) { |
| 147 | SkMatrix3D m; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 148 | m.setRotateX(degX); |
| 149 | this->setConcat(*this, m); |
| 150 | } |
| 151 | |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 152 | void SkMatrix3D::preRotateY(SkScalar degY) { |
| 153 | SkMatrix3D m; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 154 | m.setRotateY(degY); |
| 155 | this->setConcat(*this, m); |
| 156 | } |
| 157 | |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 158 | void SkMatrix3D::preRotateZ(SkScalar degZ) { |
| 159 | SkMatrix3D m; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 160 | m.setRotateZ(degZ); |
| 161 | this->setConcat(*this, m); |
| 162 | } |
| 163 | |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 164 | void SkMatrix3D::setConcat(const SkMatrix3D& a, const SkMatrix3D& b) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 165 | SkMatrix3D tmp; |
| 166 | SkMatrix3D* c = this; |
| 167 | |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 168 | if (this == &a || this == &b) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 169 | c = &tmp; |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 170 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 171 | for (int i = 0; i < 3; i++) { |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 172 | for (int j = 0; j < 3; j++) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 173 | c->fMat[i][j] = SkScalarDot(3, &a.fMat[i][0], 1, &b.fMat[0][j], 4); |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 174 | } |
| 175 | c->fMat[i][3] = SkScalarDot(3, &a.fMat[i][0], 1, |
| 176 | &b.fMat[0][3], 4) + a.fMat[i][3]; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 177 | } |
| 178 | |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 179 | if (c == &tmp) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 180 | *this = tmp; |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 181 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 182 | } |
| 183 | |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 184 | void SkMatrix3D::mapPoint(const SkPoint3D& src, SkPoint3D* dst) const { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 185 | SkScalar x = SkScalarDot(3, &fMat[0][0], 1, &src.fX, 1) + fMat[0][3]; |
| 186 | SkScalar y = SkScalarDot(3, &fMat[1][0], 1, &src.fX, 1) + fMat[1][3]; |
| 187 | SkScalar z = SkScalarDot(3, &fMat[2][0], 1, &src.fX, 1) + fMat[2][3]; |
| 188 | dst->set(x, y, z); |
| 189 | } |
| 190 | |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 191 | void SkMatrix3D::mapVector(const SkVector3D& src, SkVector3D* dst) const { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 192 | SkScalar x = SkScalarDot(3, &fMat[0][0], 1, &src.fX, 1); |
| 193 | SkScalar y = SkScalarDot(3, &fMat[1][0], 1, &src.fX, 1); |
| 194 | SkScalar z = SkScalarDot(3, &fMat[2][0], 1, &src.fX, 1); |
| 195 | dst->set(x, y, z); |
| 196 | } |
| 197 | |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 198 | /////////////////////////////////////////////////////////////////////////////// |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 199 | |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 200 | SkCamera3D::SkCamera3D() { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 201 | this->reset(); |
| 202 | } |
| 203 | |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 204 | void SkCamera3D::reset() { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 205 | fLocation.set(0, 0, -SkIntToScalar(576)); // 8 inches backward |
| 206 | fAxis.set(0, 0, SK_Scalar1); // forward |
| 207 | fZenith.set(0, -SK_Scalar1, 0); // up |
| 208 | |
| 209 | fObserver.set(0, 0, fLocation.fZ); |
| 210 | |
| 211 | fNeedToUpdate = true; |
| 212 | } |
| 213 | |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 214 | void SkCamera3D::update() { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 215 | fNeedToUpdate = true; |
| 216 | } |
| 217 | |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 218 | void SkCamera3D::doUpdate() const { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 219 | SkUnit3D axis, zenith, cross; |
| 220 | |
| 221 | fAxis.normalize(&axis); |
| 222 | |
| 223 | { |
bsalomon@google.com | 373ebc6 | 2012-09-26 13:08:56 +0000 | [diff] [blame] | 224 | SkScalar dot = SkUnit3D::Dot(*SkTCast<const SkUnit3D*>(&fZenith), axis); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 225 | |
| 226 | zenith.fX = fZenith.fX - SkUnitScalarMul(dot, axis.fX); |
| 227 | zenith.fY = fZenith.fY - SkUnitScalarMul(dot, axis.fY); |
| 228 | zenith.fZ = fZenith.fZ - SkUnitScalarMul(dot, axis.fZ); |
| 229 | |
bsalomon@google.com | 373ebc6 | 2012-09-26 13:08:56 +0000 | [diff] [blame] | 230 | SkTCast<SkPoint3D*>(&zenith)->normalize(&zenith); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 231 | } |
| 232 | |
| 233 | SkUnit3D::Cross(axis, zenith, &cross); |
| 234 | |
| 235 | { |
| 236 | SkMatrix* orien = &fOrientation; |
| 237 | SkScalar x = fObserver.fX; |
| 238 | SkScalar y = fObserver.fY; |
| 239 | SkScalar z = fObserver.fZ; |
| 240 | |
| 241 | orien->set(SkMatrix::kMScaleX, SkUnitScalarMul(x, axis.fX) - SkUnitScalarMul(z, cross.fX)); |
| 242 | orien->set(SkMatrix::kMSkewX, SkUnitScalarMul(x, axis.fY) - SkUnitScalarMul(z, cross.fY)); |
| 243 | orien->set(SkMatrix::kMTransX, SkUnitScalarMul(x, axis.fZ) - SkUnitScalarMul(z, cross.fZ)); |
| 244 | orien->set(SkMatrix::kMSkewY, SkUnitScalarMul(y, axis.fX) - SkUnitScalarMul(z, zenith.fX)); |
| 245 | orien->set(SkMatrix::kMScaleY, SkUnitScalarMul(y, axis.fY) - SkUnitScalarMul(z, zenith.fY)); |
| 246 | orien->set(SkMatrix::kMTransY, SkUnitScalarMul(y, axis.fZ) - SkUnitScalarMul(z, zenith.fZ)); |
| 247 | orien->set(SkMatrix::kMPersp0, axis.fX); |
| 248 | orien->set(SkMatrix::kMPersp1, axis.fY); |
| 249 | orien->set(SkMatrix::kMPersp2, axis.fZ); |
| 250 | } |
| 251 | } |
| 252 | |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 253 | void SkCamera3D::patchToMatrix(const SkPatch3D& quilt, SkMatrix* matrix) const { |
| 254 | if (fNeedToUpdate) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 255 | this->doUpdate(); |
| 256 | fNeedToUpdate = false; |
| 257 | } |
| 258 | |
| 259 | const SkScalar* mapPtr = (const SkScalar*)(const void*)&fOrientation; |
| 260 | const SkScalar* patchPtr; |
| 261 | SkPoint3D diff; |
| 262 | SkScalar dot; |
| 263 | |
| 264 | diff.fX = quilt.fOrigin.fX - fLocation.fX; |
| 265 | diff.fY = quilt.fOrigin.fY - fLocation.fY; |
| 266 | diff.fZ = quilt.fOrigin.fZ - fLocation.fZ; |
| 267 | |
bsalomon@google.com | 373ebc6 | 2012-09-26 13:08:56 +0000 | [diff] [blame] | 268 | dot = SkUnit3D::Dot(*SkTCast<const SkUnit3D*>(&diff), |
| 269 | *SkTCast<const SkUnit3D*>(SkTCast<const SkScalar*>(&fOrientation) + 6)); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 270 | |
| 271 | patchPtr = (const SkScalar*)&quilt; |
| 272 | matrix->set(SkMatrix::kMScaleX, SkScalarDotDiv(3, patchPtr, 1, mapPtr, 1, dot)); |
| 273 | matrix->set(SkMatrix::kMSkewY, SkScalarDotDiv(3, patchPtr, 1, mapPtr+3, 1, dot)); |
| 274 | matrix->set(SkMatrix::kMPersp0, SkScalarDotDiv(3, patchPtr, 1, mapPtr+6, 1, dot)); |
| 275 | |
| 276 | patchPtr += 3; |
| 277 | matrix->set(SkMatrix::kMSkewX, SkScalarDotDiv(3, patchPtr, 1, mapPtr, 1, dot)); |
| 278 | matrix->set(SkMatrix::kMScaleY, SkScalarDotDiv(3, patchPtr, 1, mapPtr+3, 1, dot)); |
| 279 | matrix->set(SkMatrix::kMPersp1, SkScalarDotDiv(3, patchPtr, 1, mapPtr+6, 1, dot)); |
| 280 | |
| 281 | patchPtr = (const SkScalar*)(const void*)&diff; |
| 282 | matrix->set(SkMatrix::kMTransX, SkScalarDotDiv(3, patchPtr, 1, mapPtr, 1, dot)); |
| 283 | matrix->set(SkMatrix::kMTransY, SkScalarDotDiv(3, patchPtr, 1, mapPtr+3, 1, dot)); |
| 284 | matrix->set(SkMatrix::kMPersp2, SK_UnitScalar1); |
| 285 | } |
| 286 | |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 287 | /////////////////////////////////////////////////////////////////////////////// |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 288 | |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 289 | Sk3DView::Sk3DView() { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 290 | fInitialRec.fMatrix.reset(); |
| 291 | fRec = &fInitialRec; |
| 292 | } |
| 293 | |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 294 | Sk3DView::~Sk3DView() { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 295 | Rec* rec = fRec; |
| 296 | while (rec != &fInitialRec) { |
| 297 | Rec* next = rec->fNext; |
| 298 | SkDELETE(rec); |
| 299 | rec = next; |
| 300 | } |
| 301 | } |
| 302 | |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 303 | void Sk3DView::save() { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 304 | Rec* rec = SkNEW(Rec); |
| 305 | rec->fNext = fRec; |
| 306 | rec->fMatrix = fRec->fMatrix; |
| 307 | fRec = rec; |
| 308 | } |
| 309 | |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 310 | void Sk3DView::restore() { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 311 | SkASSERT(fRec != &fInitialRec); |
| 312 | Rec* next = fRec->fNext; |
| 313 | SkDELETE(fRec); |
| 314 | fRec = next; |
| 315 | } |
| 316 | |
djsollen@google.com | 56c6977 | 2011-11-08 19:00:26 +0000 | [diff] [blame] | 317 | #ifdef SK_BUILD_FOR_ANDROID |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 318 | void Sk3DView::setCameraLocation(SkScalar x, SkScalar y, SkScalar z) { |
djsollen@google.com | cd9d69b | 2011-03-14 20:30:14 +0000 | [diff] [blame] | 319 | // the camera location is passed in inches, set in pt |
commit-bot@chromium.org | 4b413c8 | 2013-11-25 19:44:07 +0000 | [diff] [blame] | 320 | SkScalar lz = z * 72.0f; |
| 321 | fCamera.fLocation.set(x * 72.0f, y * 72.0f, lz); |
djsollen@google.com | cd9d69b | 2011-03-14 20:30:14 +0000 | [diff] [blame] | 322 | fCamera.fObserver.set(0, 0, lz); |
| 323 | fCamera.update(); |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 324 | |
djsollen@google.com | cd9d69b | 2011-03-14 20:30:14 +0000 | [diff] [blame] | 325 | } |
djsollen@google.com | e63793a | 2012-03-21 15:39:03 +0000 | [diff] [blame] | 326 | |
| 327 | SkScalar Sk3DView::getCameraLocationX() { |
commit-bot@chromium.org | 4b413c8 | 2013-11-25 19:44:07 +0000 | [diff] [blame] | 328 | return fCamera.fLocation.fX / 72.0f; |
djsollen@google.com | e63793a | 2012-03-21 15:39:03 +0000 | [diff] [blame] | 329 | } |
| 330 | |
| 331 | SkScalar Sk3DView::getCameraLocationY() { |
commit-bot@chromium.org | 4b413c8 | 2013-11-25 19:44:07 +0000 | [diff] [blame] | 332 | return fCamera.fLocation.fY / 72.0f; |
djsollen@google.com | e63793a | 2012-03-21 15:39:03 +0000 | [diff] [blame] | 333 | } |
| 334 | |
| 335 | SkScalar Sk3DView::getCameraLocationZ() { |
commit-bot@chromium.org | 4b413c8 | 2013-11-25 19:44:07 +0000 | [diff] [blame] | 336 | return fCamera.fLocation.fZ / 72.0f; |
djsollen@google.com | e63793a | 2012-03-21 15:39:03 +0000 | [diff] [blame] | 337 | } |
djsollen@google.com | cd9d69b | 2011-03-14 20:30:14 +0000 | [diff] [blame] | 338 | #endif |
| 339 | |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 340 | void Sk3DView::translate(SkScalar x, SkScalar y, SkScalar z) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 341 | fRec->fMatrix.preTranslate(x, y, z); |
| 342 | } |
| 343 | |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 344 | void Sk3DView::rotateX(SkScalar deg) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 345 | fRec->fMatrix.preRotateX(deg); |
| 346 | } |
| 347 | |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 348 | void Sk3DView::rotateY(SkScalar deg) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 349 | fRec->fMatrix.preRotateY(deg); |
| 350 | } |
| 351 | |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 352 | void Sk3DView::rotateZ(SkScalar deg) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 353 | fRec->fMatrix.preRotateZ(deg); |
| 354 | } |
| 355 | |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 356 | SkScalar Sk3DView::dotWithNormal(SkScalar x, SkScalar y, SkScalar z) const { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 357 | SkPatch3D patch; |
| 358 | patch.transform(fRec->fMatrix); |
| 359 | return patch.dotWith(x, y, z); |
| 360 | } |
| 361 | |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 362 | void Sk3DView::getMatrix(SkMatrix* matrix) const { |
| 363 | if (matrix != NULL) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 364 | SkPatch3D patch; |
| 365 | patch.transform(fRec->fMatrix); |
| 366 | fCamera.patchToMatrix(patch, matrix); |
| 367 | } |
| 368 | } |
| 369 | |
| 370 | #include "SkCanvas.h" |
| 371 | |
reed@google.com | 91408cc | 2011-04-18 18:47:46 +0000 | [diff] [blame] | 372 | void Sk3DView::applyToCanvas(SkCanvas* canvas) const { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 373 | SkMatrix matrix; |
rmistry@google.com | d6176b0 | 2012-08-23 18:14:13 +0000 | [diff] [blame] | 374 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 375 | this->getMatrix(&matrix); |
| 376 | canvas->concat(matrix); |
| 377 | } |