25bd5d8adb
subrepo: subdir: "deps/juce" merged: "b13f9084e" upstream: origin: "https://github.com/essej/JUCE.git" branch: "sono6good" commit: "b13f9084e" git-subrepo: version: "0.4.3" origin: "https://github.com/ingydotnet/git-subrepo.git" commit: "2f68596"
281 lines
8.9 KiB
C++
281 lines
8.9 KiB
C++
/*
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==============================================================================
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This file is part of the JUCE library.
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Copyright (c) 2020 - Raw Material Software Limited
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JUCE is an open source library subject to commercial or open-source
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licensing.
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By using JUCE, you agree to the terms of both the JUCE 6 End-User License
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Agreement and JUCE Privacy Policy (both effective as of the 16th June 2020).
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End User License Agreement: www.juce.com/juce-6-licence
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Privacy Policy: www.juce.com/juce-privacy-policy
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Or: You may also use this code under the terms of the GPL v3 (see
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www.gnu.org/licenses).
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JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
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EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
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DISCLAIMED.
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==============================================================================
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*/
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namespace juce
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{
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AffineTransform::AffineTransform (float m00, float m01, float m02,
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float m10, float m11, float m12) noexcept
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: mat00 (m00), mat01 (m01), mat02 (m02),
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mat10 (m10), mat11 (m11), mat12 (m12)
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{
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}
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bool AffineTransform::operator== (const AffineTransform& other) const noexcept
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{
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return mat00 == other.mat00
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&& mat01 == other.mat01
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&& mat02 == other.mat02
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&& mat10 == other.mat10
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&& mat11 == other.mat11
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&& mat12 == other.mat12;
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}
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bool AffineTransform::operator!= (const AffineTransform& other) const noexcept
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{
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return ! operator== (other);
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}
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//==============================================================================
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bool AffineTransform::isIdentity() const noexcept
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{
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return mat01 == 0.0f
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&& mat02 == 0.0f
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&& mat10 == 0.0f
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&& mat12 == 0.0f
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&& mat00 == 1.0f
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&& mat11 == 1.0f;
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}
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const AffineTransform AffineTransform::identity (1.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f);
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//==============================================================================
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AffineTransform AffineTransform::followedBy (const AffineTransform& other) const noexcept
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{
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return { other.mat00 * mat00 + other.mat01 * mat10,
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other.mat00 * mat01 + other.mat01 * mat11,
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other.mat00 * mat02 + other.mat01 * mat12 + other.mat02,
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other.mat10 * mat00 + other.mat11 * mat10,
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other.mat10 * mat01 + other.mat11 * mat11,
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other.mat10 * mat02 + other.mat11 * mat12 + other.mat12 };
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}
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AffineTransform AffineTransform::translated (float dx, float dy) const noexcept
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{
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return { mat00, mat01, mat02 + dx,
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mat10, mat11, mat12 + dy };
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}
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AffineTransform AffineTransform::translation (float dx, float dy) noexcept
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{
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return { 1.0f, 0.0f, dx,
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0.0f, 1.0f, dy };
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}
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AffineTransform AffineTransform::withAbsoluteTranslation (float tx, float ty) const noexcept
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{
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return { mat00, mat01, tx,
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mat10, mat11, ty };
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}
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AffineTransform AffineTransform::rotated (float rad) const noexcept
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{
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auto cosRad = std::cos (rad);
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auto sinRad = std::sin (rad);
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return { cosRad * mat00 - sinRad * mat10,
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cosRad * mat01 - sinRad * mat11,
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cosRad * mat02 - sinRad * mat12,
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sinRad * mat00 + cosRad * mat10,
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sinRad * mat01 + cosRad * mat11,
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sinRad * mat02 + cosRad * mat12 };
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}
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AffineTransform AffineTransform::rotation (float rad) noexcept
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{
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auto cosRad = std::cos (rad);
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auto sinRad = std::sin (rad);
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return { cosRad, -sinRad, 0,
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sinRad, cosRad, 0 };
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}
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AffineTransform AffineTransform::rotation (float rad, float pivotX, float pivotY) noexcept
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{
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auto cosRad = std::cos (rad);
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auto sinRad = std::sin (rad);
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return { cosRad, -sinRad, -cosRad * pivotX + sinRad * pivotY + pivotX,
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sinRad, cosRad, -sinRad * pivotX + -cosRad * pivotY + pivotY };
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}
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AffineTransform AffineTransform::rotated (float angle, float pivotX, float pivotY) const noexcept
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{
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return followedBy (rotation (angle, pivotX, pivotY));
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}
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AffineTransform AffineTransform::scaled (float factorX, float factorY) const noexcept
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{
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return { factorX * mat00, factorX * mat01, factorX * mat02,
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factorY * mat10, factorY * mat11, factorY * mat12 };
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}
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AffineTransform AffineTransform::scaled (float factor) const noexcept
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{
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return { factor * mat00, factor * mat01, factor * mat02,
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factor * mat10, factor * mat11, factor * mat12 };
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}
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AffineTransform AffineTransform::scale (float factorX, float factorY) noexcept
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{
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return { factorX, 0, 0, 0, factorY, 0 };
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}
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AffineTransform AffineTransform::scale (float factor) noexcept
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{
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return { factor, 0, 0, 0, factor, 0 };
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}
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AffineTransform AffineTransform::scaled (float factorX, float factorY,
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float pivotX, float pivotY) const noexcept
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{
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return { factorX * mat00, factorX * mat01, factorX * mat02 + pivotX * (1.0f - factorX),
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factorY * mat10, factorY * mat11, factorY * mat12 + pivotY * (1.0f - factorY) };
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}
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AffineTransform AffineTransform::scale (float factorX, float factorY,
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float pivotX, float pivotY) noexcept
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{
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return { factorX, 0, pivotX * (1.0f - factorX),
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0, factorY, pivotY * (1.0f - factorY) };
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}
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AffineTransform AffineTransform::shear (float shearX, float shearY) noexcept
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{
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return { 1.0f, shearX, 0,
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shearY, 1.0f, 0 };
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}
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AffineTransform AffineTransform::sheared (float shearX, float shearY) const noexcept
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{
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return { mat00 + shearX * mat10,
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mat01 + shearX * mat11,
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mat02 + shearX * mat12,
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mat10 + shearY * mat00,
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mat11 + shearY * mat01,
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mat12 + shearY * mat02 };
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}
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AffineTransform AffineTransform::verticalFlip (float height) noexcept
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{
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return { 1.0f, 0.0f, 0.0f,
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0.0f, -1.0f, height };
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}
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AffineTransform AffineTransform::inverted() const noexcept
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{
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double determinant = getDeterminant();
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if (! approximatelyEqual (determinant, 0.0))
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{
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determinant = 1.0 / determinant;
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auto dst00 = (float) ( mat11 * determinant);
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auto dst10 = (float) (-mat10 * determinant);
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auto dst01 = (float) (-mat01 * determinant);
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auto dst11 = (float) ( mat00 * determinant);
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return { dst00, dst01, -mat02 * dst00 - mat12 * dst01,
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dst10, dst11, -mat02 * dst10 - mat12 * dst11 };
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}
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// singularity..
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return *this;
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}
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bool AffineTransform::isSingularity() const noexcept
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{
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return (mat00 * mat11 - mat10 * mat01) == 0.0f;
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}
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AffineTransform AffineTransform::fromTargetPoints (float x00, float y00,
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float x10, float y10,
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float x01, float y01) noexcept
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{
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return { x10 - x00, x01 - x00, x00,
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y10 - y00, y01 - y00, y00 };
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}
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AffineTransform AffineTransform::fromTargetPoints (float sx1, float sy1, float tx1, float ty1,
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float sx2, float sy2, float tx2, float ty2,
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float sx3, float sy3, float tx3, float ty3) noexcept
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{
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return fromTargetPoints (sx1, sy1, sx2, sy2, sx3, sy3)
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.inverted()
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.followedBy (fromTargetPoints (tx1, ty1, tx2, ty2, tx3, ty3));
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}
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bool AffineTransform::isOnlyTranslation() const noexcept
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{
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return mat01 == 0.0f
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&& mat10 == 0.0f
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&& mat00 == 1.0f
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&& mat11 == 1.0f;
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}
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float AffineTransform::getDeterminant() const noexcept
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{
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return (mat00 * mat11) - (mat01 * mat10);
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}
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float AffineTransform::getScaleFactor() const noexcept
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{
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return (std::abs (mat00) + std::abs (mat11)) / 2.0f;
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}
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//==============================================================================
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//==============================================================================
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#if JUCE_UNIT_TESTS
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class AffineTransformTests : public UnitTest
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{
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public:
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AffineTransformTests()
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: UnitTest ("AffineTransform", UnitTestCategories::maths)
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{}
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void runTest() override
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{
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beginTest ("Determinant");
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{
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constexpr float scale1 = 1.5f, scale2 = 1.3f;
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auto transform = AffineTransform::scale (scale1)
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.followedBy (AffineTransform::rotation (degreesToRadians (72.0f)))
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.followedBy (AffineTransform::translation (100.0f, 20.0f))
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.followedBy (AffineTransform::scale (scale2));
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expect (approximatelyEqual (std::sqrt (std::abs (transform.getDeterminant())), scale1 * scale2));
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}
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}
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};
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static AffineTransformTests timeTests;
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#endif
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} // namespace juce
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