public void TestZoom1_XOnly_ZDirection()
{
double aspectRatio = 1.0;
double cameraDistanceOriginal = 1000;
double zNear = 100;
double zFar = 10000;
double widthByZNear = 0.5;
double distanceFactor = 0.75;
PointD3D targetPosition = new PointD3D(0, 0, 0);
VectorD3D targetToEye = new VectorD3D(0, 0, cameraDistanceOriginal);
VectorD3D cameraUpVector = new VectorD3D(0, 1, 0);
VectorD3D targetToWorldPoint = new VectorD3D(200, 0, 0);
PointD3D cameraPosition = targetPosition + targetToEye;
PointD3D worldPoint = targetPosition + targetToWorldPoint;
Assert.AreEqual(0, VectorD3D.DotProduct(targetToEye, targetToWorldPoint), "The test must be set up in a way that targetToEye and targetToWorldPoint are perpendicular to each other");
var cameraO = new PerspectiveCamera(cameraUpVector, cameraPosition, targetPosition, zNear, zFar, widthByZNear * zNear);
var screenO = cameraO.GetViewProjectionMatrix(aspectRatio).Transform(worldPoint);
Assert.AreEqual(0.0, screenO.Y, "Test must be set up so that screen.Y is always zero");
var cameraN = cameraO.ZoomByGettingCloserToTarget(distanceFactor, screenO.X, screenO.Y, aspectRatio);
var screenN = cameraN.GetViewProjectionMatrix(aspectRatio).Transform(worldPoint);
Assert.AreEqual(screenO.X, screenN.X, 1E-3);
Assert.AreEqual(screenO.Y, screenN.Y, 1E-3);
}
public void TestZoom1_XY()
{
double aspectRatio = 1.0;
double cameraDistanceOriginal = 1000;
double zNear = 100;
double zFar = 10000;
double widthByZNear = 0.5;
double distanceFactor = 0.75;
var cameraPosition = new PointD3D(0, 0, cameraDistanceOriginal);
var targetPosition = new PointD3D(0, 0, 0);
var worldPoint = new PointD3D(200, 200, 0);
var cameraO = new PerspectiveCamera(new VectorD3D(0, 1, 0), cameraPosition, targetPosition, zNear, zFar, widthByZNear * zNear);
var screenO = cameraO.GetViewProjectionMatrix(aspectRatio).Transform(worldPoint);
var cameraN = cameraO.ZoomByGettingCloserToTarget(distanceFactor, screenO.X, screenO.Y, aspectRatio);
var screenN = cameraN.GetViewProjectionMatrix(aspectRatio).Transform(worldPoint);
Assert.AreEqual(screenO.X, screenN.X, 1E-3);
Assert.AreEqual(screenO.Y, screenN.Y, 1E-3);
}
public void TestZoom1_XY()
{
double aspectRatio = 1.0;
double cameraDistanceOriginal = 1000;
double zNear = 100;
double zFar = 10000;
double widthByZNear = 0.5;
double distanceFactor = 0.75;
PointD3D cameraPosition = new PointD3D(0, 0, cameraDistanceOriginal);
PointD3D targetPosition = new PointD3D(0, 0, 0);
PointD3D worldPoint = new PointD3D(200, 200, 0);
var cameraO = new PerspectiveCamera(new VectorD3D(0, 1, 0), cameraPosition, targetPosition, zNear, zFar, widthByZNear * zNear);
var screenO = cameraO.GetViewProjectionMatrix(aspectRatio).Transform(worldPoint);
var cameraN = cameraO.ZoomByGettingCloserToTarget(distanceFactor, screenO.X, screenO.Y, aspectRatio);
var screenN = cameraN.GetViewProjectionMatrix(aspectRatio).Transform(worldPoint);
Assert.AreEqual(screenO.X, screenN.X, 1E-3);
Assert.AreEqual(screenO.Y, screenN.Y, 1E-3);
}