Index: cc/CCMathUtilTest.cpp |
diff --git a/cc/CCMathUtilTest.cpp b/cc/CCMathUtilTest.cpp |
deleted file mode 100644 |
index 5fd1e8ec82262107ff60c2d76212fda662e0d10d..0000000000000000000000000000000000000000 |
--- a/cc/CCMathUtilTest.cpp |
+++ /dev/null |
@@ -1,182 +0,0 @@ |
-// Copyright 2012 The Chromium Authors. All rights reserved. |
-// Use of this source code is governed by a BSD-style license that can be |
-// found in the LICENSE file. |
- |
-#include "config.h" |
- |
-#include "CCMathUtil.h" |
- |
-#include "CCGeometryTestUtils.h" |
-#include "FloatRect.h" |
-#include "testing/gmock/include/gmock/gmock.h" |
-#include "testing/gtest/include/gtest/gtest.h" |
-#include <public/WebTransformationMatrix.h> |
- |
-using namespace cc; |
-using WebKit::WebTransformationMatrix; |
- |
-namespace { |
- |
-TEST(CCMathUtilTest, verifyBackfaceVisibilityBasicCases) |
-{ |
- WebTransformationMatrix transform; |
- |
- transform.makeIdentity(); |
- EXPECT_FALSE(transform.isBackFaceVisible()); |
- |
- transform.makeIdentity(); |
- transform.rotate3d(0, 80, 0); |
- EXPECT_FALSE(transform.isBackFaceVisible()); |
- |
- transform.makeIdentity(); |
- transform.rotate3d(0, 100, 0); |
- EXPECT_TRUE(transform.isBackFaceVisible()); |
- |
- // Edge case, 90 degree rotation should return false. |
- transform.makeIdentity(); |
- transform.rotate3d(0, 90, 0); |
- EXPECT_FALSE(transform.isBackFaceVisible()); |
-} |
- |
-TEST(CCMathUtilTest, verifyBackfaceVisibilityForPerspective) |
-{ |
- WebTransformationMatrix layerSpaceToProjectionPlane; |
- |
- // This tests if isBackFaceVisible works properly under perspective transforms. |
- // Specifically, layers that may have their back face visible in orthographic |
- // projection, may not actually have back face visible under perspective projection. |
- |
- // Case 1: Layer is rotated by slightly more than 90 degrees, at the center of the |
- // prespective projection. In this case, the layer's back-side is visible to |
- // the camera. |
- layerSpaceToProjectionPlane.makeIdentity(); |
- layerSpaceToProjectionPlane.applyPerspective(1); |
- layerSpaceToProjectionPlane.translate3d(0, 0, 0); |
- layerSpaceToProjectionPlane.rotate3d(0, 100, 0); |
- EXPECT_TRUE(layerSpaceToProjectionPlane.isBackFaceVisible()); |
- |
- // Case 2: Layer is rotated by slightly more than 90 degrees, but shifted off to the |
- // side of the camera. Because of the wide field-of-view, the layer's front |
- // side is still visible. |
- // |
- // |<-- front side of layer is visible to perspective camera |
- // \ | / |
- // \ | / |
- // \| / |
- // | / |
- // |\ /<-- camera field of view |
- // | \ / |
- // back side of layer -->| \ / |
- // \./ <-- camera origin |
- // |
- layerSpaceToProjectionPlane.makeIdentity(); |
- layerSpaceToProjectionPlane.applyPerspective(1); |
- layerSpaceToProjectionPlane.translate3d(-10, 0, 0); |
- layerSpaceToProjectionPlane.rotate3d(0, 100, 0); |
- EXPECT_FALSE(layerSpaceToProjectionPlane.isBackFaceVisible()); |
- |
- // Case 3: Additionally rotating the layer by 180 degrees should of course show the |
- // opposite result of case 2. |
- layerSpaceToProjectionPlane.rotate3d(0, 180, 0); |
- EXPECT_TRUE(layerSpaceToProjectionPlane.isBackFaceVisible()); |
-} |
- |
-TEST(CCMathUtilTest, verifyProjectionOfPerpendicularPlane) |
-{ |
- // In this case, the m33() element of the transform becomes zero, which could cause a |
- // divide-by-zero when projecting points/quads. |
- |
- WebTransformationMatrix transform; |
- transform.makeIdentity(); |
- transform.setM33(0); |
- |
- FloatRect rect = FloatRect(0, 0, 1, 1); |
- FloatRect projectedRect = CCMathUtil::projectClippedRect(transform, rect); |
- |
- EXPECT_EQ(0, projectedRect.x()); |
- EXPECT_EQ(0, projectedRect.y()); |
- EXPECT_TRUE(projectedRect.isEmpty()); |
-} |
- |
-TEST(CCMathUtilTest, verifyEnclosingClippedRectUsesCorrectInitialBounds) |
-{ |
- HomogeneousCoordinate h1(-100, -100, 0, 1); |
- HomogeneousCoordinate h2(-10, -10, 0, 1); |
- HomogeneousCoordinate h3(10, 10, 0, -1); |
- HomogeneousCoordinate h4(100, 100, 0, -1); |
- |
- // The bounds of the enclosing clipped rect should be -100 to -10 for both x and y. |
- // However, if there is a bug where the initial xmin/xmax/ymin/ymax are initialized to |
- // numeric_limits<float>::min() (which is zero, not -flt_max) then the enclosing |
- // clipped rect will be computed incorrectly. |
- FloatRect result = CCMathUtil::computeEnclosingClippedRect(h1, h2, h3, h4); |
- |
- EXPECT_FLOAT_RECT_EQ(FloatRect(FloatPoint(-100, -100), FloatSize(90, 90)), result); |
-} |
- |
-TEST(CCMathUtilTest, verifyEnclosingRectOfVerticesUsesCorrectInitialBounds) |
-{ |
- FloatPoint vertices[3]; |
- int numVertices = 3; |
- |
- vertices[0] = FloatPoint(-10, -100); |
- vertices[1] = FloatPoint(-100, -10); |
- vertices[2] = FloatPoint(-30, -30); |
- |
- // The bounds of the enclosing rect should be -100 to -10 for both x and y. However, |
- // if there is a bug where the initial xmin/xmax/ymin/ymax are initialized to |
- // numeric_limits<float>::min() (which is zero, not -flt_max) then the enclosing |
- // clipped rect will be computed incorrectly. |
- FloatRect result = CCMathUtil::computeEnclosingRectOfVertices(vertices, numVertices); |
- |
- EXPECT_FLOAT_RECT_EQ(FloatRect(FloatPoint(-100, -100), FloatSize(90, 90)), result); |
-} |
- |
-TEST(CCMathUtilTest, smallestAngleBetweenVectors) |
-{ |
- FloatSize x(1, 0); |
- FloatSize y(0, 1); |
- FloatSize testVector(0.5, 0.5); |
- |
- // Orthogonal vectors are at an angle of 90 degress. |
- EXPECT_EQ(90, CCMathUtil::smallestAngleBetweenVectors(x, y)); |
- |
- // A vector makes a zero angle with itself. |
- EXPECT_EQ(0, CCMathUtil::smallestAngleBetweenVectors(x, x)); |
- EXPECT_EQ(0, CCMathUtil::smallestAngleBetweenVectors(y, y)); |
- EXPECT_EQ(0, CCMathUtil::smallestAngleBetweenVectors(testVector, testVector)); |
- |
- // Parallel but reversed vectors are at 180 degrees. |
- EXPECT_FLOAT_EQ(180, CCMathUtil::smallestAngleBetweenVectors(x, -x)); |
- EXPECT_FLOAT_EQ(180, CCMathUtil::smallestAngleBetweenVectors(y, -y)); |
- EXPECT_FLOAT_EQ(180, CCMathUtil::smallestAngleBetweenVectors(testVector, -testVector)); |
- |
- // The test vector is at a known angle. |
- EXPECT_FLOAT_EQ(45, floor(CCMathUtil::smallestAngleBetweenVectors(testVector, x))); |
- EXPECT_FLOAT_EQ(45, floor(CCMathUtil::smallestAngleBetweenVectors(testVector, y))); |
-} |
- |
-TEST(CCMathUtilTest, vectorProjection) |
-{ |
- FloatSize x(1, 0); |
- FloatSize y(0, 1); |
- FloatSize testVector(0.3f, 0.7f); |
- |
- // Orthogonal vectors project to a zero vector. |
- EXPECT_EQ(FloatSize(0, 0), CCMathUtil::projectVector(x, y)); |
- EXPECT_EQ(FloatSize(0, 0), CCMathUtil::projectVector(y, x)); |
- |
- // Projecting a vector onto the orthonormal basis gives the corresponding component of the |
- // vector. |
- EXPECT_EQ(FloatSize(testVector.width(), 0), CCMathUtil::projectVector(testVector, x)); |
- EXPECT_EQ(FloatSize(0, testVector.height()), CCMathUtil::projectVector(testVector, y)); |
- |
- // Finally check than an arbitrary vector projected to another one gives a vector parallel to |
- // the second vector. |
- FloatSize targetVector(0.5, 0.2f); |
- FloatSize projectedVector = CCMathUtil::projectVector(testVector, targetVector); |
- EXPECT_EQ(projectedVector.width() / targetVector.width(), |
- projectedVector.height() / targetVector.height()); |
-} |
- |
-} // namespace |