OrthographicOffCenterFrustum

new SuperMap3D.OrthographicOffCenterFrustum()

The viewing frustum is defined by 6 planes. Each plane is represented by a Cartesian4 object, where the x, y, and z components define the unit vector normal to the plane, and the w component is the distance of the plane from the origin/camera position.
Example:
var maxRadii = ellipsoid.maximumRadius;

var frustum = new SuperMap3D.OrthographicOffCenterFrustum();
frustum.near = 0.01 * maxRadii;
frustum.far = 50.0 * maxRadii;

Members

bottom : Number

The bottom clipping plane.
Default Value: undefined

far : Number

The distance of the far plane.
Default Value: 500000000.0;

far : Number

The distance of the far plane.
Default Value: 500000000.0;

left : Number

The left clipping plane.
Default Value: undefined

near : Number

The distance of the near plane.
Default Value: 1.0

near : Number

The distance of the near plane.
Default Value: 1.0

readonlyprojectionMatrix : Matrix4

Gets the orthographic projection matrix computed from the view frustum.
The right clipping plane.
Default Value: undefined

top : Number

The top clipping plane.
Default Value: undefined

Methods

clone(result) → OrthographicFrustum

Returns a duplicate of a OrthographicFrustum instance.
Name Type Description
result OrthographicFrustum optional The object onto which to store the result.
Returns:
The modified result parameter or a new OrthographicFrustum instance if one was not provided.

clone(result) → OrthographicOffCenterFrustum

Returns a duplicate of a OrthographicOffCenterFrustum instance.
Name Type Description
result OrthographicOffCenterFrustum optional The object onto which to store the result.
Returns:
The modified result parameter or a new OrthographicOffCenterFrustum instance if one was not provided.

computeCullingVolume(position, direction, up) → CullingVolume

Creates a culling volume for this frustum.
Name Type Description
position Cartesian3 The eye position.
direction Cartesian3 The view direction.
up Cartesian3 The up direction.
Returns:
A culling volume at the given position and orientation.
Example:
// Check if a bounding volume intersects the frustum.
var cullingVolume = frustum.computeCullingVolume(cameraPosition, cameraDirection, cameraUp);
var intersect = cullingVolume.computeVisibility(boundingVolume);

computeCullingVolume(position, direction, up) → CullingVolume

Creates a culling volume for this frustum.
Name Type Description
position Cartesian3 The eye position.
direction Cartesian3 The view direction.
up Cartesian3 The up direction.
Returns:
A culling volume at the given position and orientation.
Example:
// Check if a bounding volume intersects the frustum.
var cullingVolume = frustum.computeCullingVolume(cameraPosition, cameraDirection, cameraUp);
var intersect = cullingVolume.computeVisibility(boundingVolume);

equals(other) → Boolean

Compares the provided OrthographicFrustum componentwise and returns true if they are equal, false otherwise.
Name Type Description
other OrthographicFrustum optional The right hand side OrthographicFrustum.
Returns:
true if they are equal, false otherwise.

equals(other) → Boolean

Compares the provided OrthographicOffCenterFrustum componentwise and returns true if they are equal, false otherwise.
Name Type Description
other OrthographicOffCenterFrustum optional The right hand side OrthographicOffCenterFrustum.
Returns:
true if they are equal, false otherwise.

getPixelDimensions(drawingBufferWidth, drawingBufferHeight, distance, result) → Cartesian2

Returns the pixel's width and height in meters.
Name Type Description
drawingBufferWidth Number The width of the drawing buffer.
drawingBufferHeight Number The height of the drawing buffer.
distance Number The distance to the near plane in meters.
result Cartesian2 The object onto which to store the result.
Returns:
The modified result parameter or a new instance of Cartesian2 with the pixel's width and height in the x and y properties, respectively.
Throws:
Example:
// Example 1
// Get the width and height of a pixel.
var pixelSize = camera.frustum.getPixelDimensions(scene.drawingBufferWidth, scene.drawingBufferHeight, 0.0, new SuperMap3D.Cartesian2());

getPixelDimensions(drawingBufferWidth, drawingBufferHeight, distance, result) → Cartesian2

Returns the pixel's width and height in meters.
Name Type Description
drawingBufferWidth Number The width of the drawing buffer.
drawingBufferHeight Number The height of the drawing buffer.
distance Number The distance to the near plane in meters.
result Cartesian2 The object onto which to store the result.
Returns:
The modified result parameter or a new instance of Cartesian2 with the pixel's width and height in the x and y properties, respectively.
Throws:
Example:
// Example 1
// Get the width and height of a pixel.
var pixelSize = camera.frustum.getPixelDimensions(scene.drawingBufferWidth, scene.drawingBufferHeight, 0.0, new SuperMap3D.Cartesian2());

new SuperMap3D.OrthographicOffCenterFrustum()

The viewing frustum is defined by 6 planes. Each plane is represented by a Cartesian4 object, where the x, y, and z components define the unit vector normal to the plane, and the w component is the distance of the plane from the origin/camera position.
Example:
var maxRadii = ellipsoid.maximumRadius;

var frustum = new SuperMap3D.OrthographicOffCenterFrustum();
frustum.right = maxRadii * SuperMap3D.Math.PI;
frustum.left = -c.frustum.right;
frustum.top = c.frustum.right * (canvas.clientHeight / canvas.clientWidth);
frustum.bottom = -c.frustum.top;
frustum.near = 0.01 * maxRadii;
frustum.far = 50.0 * maxRadii;

Members

bottom : Number

The bottom clipping plane.
Default Value: undefined

far : Number

The distance of the far plane.
Default Value: 500000000.0;

far : Number

The distance of the far plane.
Default Value: 500000000.0;

left : Number

The left clipping plane.
Default Value: undefined

near : Number

The distance of the near plane.
Default Value: 1.0

near : Number

The distance of the near plane.
Default Value: 1.0

readonlyprojectionMatrix : Matrix4

Gets the orthographic projection matrix computed from the view frustum.
The right clipping plane.
Default Value: undefined

top : Number

The top clipping plane.
Default Value: undefined

Methods

clone(result) → OrthographicFrustum

Returns a duplicate of a OrthographicFrustum instance.
Name Type Description
result OrthographicFrustum optional The object onto which to store the result.
Returns:
The modified result parameter or a new OrthographicFrustum instance if one was not provided.

clone(result) → OrthographicOffCenterFrustum

Returns a duplicate of a OrthographicOffCenterFrustum instance.
Name Type Description
result OrthographicOffCenterFrustum optional The object onto which to store the result.
Returns:
The modified result parameter or a new OrthographicOffCenterFrustum instance if one was not provided.

computeCullingVolume(position, direction, up) → CullingVolume

Creates a culling volume for this frustum.
Name Type Description
position Cartesian3 The eye position.
direction Cartesian3 The view direction.
up Cartesian3 The up direction.
Returns:
A culling volume at the given position and orientation.
Example:
// Check if a bounding volume intersects the frustum.
var cullingVolume = frustum.computeCullingVolume(cameraPosition, cameraDirection, cameraUp);
var intersect = cullingVolume.computeVisibility(boundingVolume);

computeCullingVolume(position, direction, up) → CullingVolume

Creates a culling volume for this frustum.
Name Type Description
position Cartesian3 The eye position.
direction Cartesian3 The view direction.
up Cartesian3 The up direction.
Returns:
A culling volume at the given position and orientation.
Example:
// Check if a bounding volume intersects the frustum.
var cullingVolume = frustum.computeCullingVolume(cameraPosition, cameraDirection, cameraUp);
var intersect = cullingVolume.computeVisibility(boundingVolume);

equals(other) → Boolean

Compares the provided OrthographicFrustum componentwise and returns true if they are equal, false otherwise.
Name Type Description
other OrthographicFrustum optional The right hand side OrthographicFrustum.
Returns:
true if they are equal, false otherwise.

equals(other) → Boolean

Compares the provided OrthographicOffCenterFrustum componentwise and returns true if they are equal, false otherwise.
Name Type Description
other OrthographicOffCenterFrustum optional The right hand side OrthographicOffCenterFrustum.
Returns:
true if they are equal, false otherwise.

getPixelDimensions(drawingBufferWidth, drawingBufferHeight, distance, result) → Cartesian2

Returns the pixel's width and height in meters.
Name Type Description
drawingBufferWidth Number The width of the drawing buffer.
drawingBufferHeight Number The height of the drawing buffer.
distance Number The distance to the near plane in meters.
result Cartesian2 The object onto which to store the result.
Returns:
The modified result parameter or a new instance of Cartesian2 with the pixel's width and height in the x and y properties, respectively.
Throws:
Example:
// Example 1
// Get the width and height of a pixel.
var pixelSize = camera.frustum.getPixelDimensions(scene.drawingBufferWidth, scene.drawingBufferHeight, 0.0, new SuperMap3D.Cartesian2());

getPixelDimensions(drawingBufferWidth, drawingBufferHeight, distance, result) → Cartesian2

Returns the pixel's width and height in meters.
Name Type Description
drawingBufferWidth Number The width of the drawing buffer.
drawingBufferHeight Number The height of the drawing buffer.
distance Number The distance to the near plane in meters.
result Cartesian2 The object onto which to store the result.
Returns:
The modified result parameter or a new instance of Cartesian2 with the pixel's width and height in the x and y properties, respectively.
Throws:
Example:
// Example 1
// Get the width and height of a pixel.
var pixelSize = camera.frustum.getPixelDimensions(scene.drawingBufferWidth, scene.drawingBufferHeight, 0.0, new SuperMap3D.Cartesian2());