| /* |
| * Copyright 2012 ZXing authors |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #import "ZXPerspectiveTransformTestCase.h" |
| |
| @implementation ZXPerspectiveTransformTestCase |
| |
| static float EPSILON = 0.0001f; |
| |
| - (void)testSquareToQuadrilateral { |
| ZXPerspectiveTransform *pt = [ZXPerspectiveTransform squareToQuadrilateral:2.0f y0:3.0f |
| x1:10.0f y1:4.0f |
| x2:16.0f y2:15.0f |
| x3:4.0f y3:9.0f]; |
| [self assertPointEqualsExpectedX:2.0f expectedY:3.0f sourceX:0.0f sourceY:0.0f pt:pt]; |
| [self assertPointEqualsExpectedX:10.0f expectedY:4.0f sourceX:1.0f sourceY:0.0f pt:pt]; |
| [self assertPointEqualsExpectedX:4.0f expectedY:9.0f sourceX:0.0f sourceY:1.0f pt:pt]; |
| [self assertPointEqualsExpectedX:16.0f expectedY:15.0f sourceX:1.0f sourceY:1.0f pt:pt]; |
| [self assertPointEqualsExpectedX:6.535211f expectedY:6.8873234f sourceX:0.5f sourceY:0.5f pt:pt]; |
| [self assertPointEqualsExpectedX:48.0f expectedY:42.42857f sourceX:1.5f sourceY:1.5f pt:pt]; |
| } |
| |
| - (void)testQuadrilateralToQuadrilateral { |
| ZXPerspectiveTransform *pt = [ZXPerspectiveTransform quadrilateralToQuadrilateral:2.0f y0:3.0f |
| x1:10.0f y1:4.0f |
| x2:16.0f y2:15.0f |
| x3:4.0f y3:9.0f |
| x0p:103.0f y0p:110.0f |
| x1p:300.0f y1p:120.0f |
| x2p:290.0f y2p:270.0f |
| x3p:150.0f y3p:280.0f]; |
| [self assertPointEqualsExpectedX:103.0f expectedY:110.0f sourceX:2.0f sourceY:3.0f pt:pt]; |
| [self assertPointEqualsExpectedX:300.0f expectedY:120.0f sourceX:10.0f sourceY:4.0f pt:pt]; |
| [self assertPointEqualsExpectedX:290.0f expectedY:270.0f sourceX:16.0f sourceY:15.0f pt:pt]; |
| [self assertPointEqualsExpectedX:150.0f expectedY:280.0f sourceX:4.0f sourceY:9.0f pt:pt]; |
| [self assertPointEqualsExpectedX:7.1516876f expectedY:-64.60185f sourceX:0.5f sourceY:0.5f pt:pt]; |
| [self assertPointEqualsExpectedX:328.09116f expectedY:334.16385f sourceX:50.0f sourceY:50.0f pt:pt]; |
| } |
| |
| - (void)assertPointEqualsExpectedX:(float)expectedX |
| expectedY:(float)expectedY |
| sourceX:(float)sourceX |
| sourceY:(float)sourceY |
| pt:(ZXPerspectiveTransform *)pt { |
| float points[2] = {sourceX, sourceY}; |
| [pt transformPoints:points pointsLen:2]; |
| STAssertEqualsWithAccuracy(points[0], expectedX, EPSILON, @"Expected %f to equal %f", points[0], expectedX); |
| STAssertEqualsWithAccuracy(points[1], expectedY, EPSILON, @"Expected %f to equal %f", points[1], expectedY); |
| } |
| |
| @end |
