CubeMap

Methods

destroy

Destroys the WebGL resources held by this object. Destroying an object allows for deterministic release of WebGL resources, instead of relying on the garbage collector to destroy this object.

Once an object is destroyed, it should not be used; calling any function other than isDestroyed will result in a DeveloperError exception. Therefore, assign the return value (undefined) to the object as done in the example.

Throws:

DeveloperError : This cube map was destroyed, i.e., destroy() was called.

Returns:

Example

cubeMap = cubeMap && cubeMap.destroy();

See:

• CubeMap#isDestroyed
• glDeleteTextures

generateMipmap

Generates a complete mipmap chain for each cubemap face.

Parameters:

Name	Type	Argument	Default	Description
hint	MipmapHint	<optional>	MipmapHint.DONT_CARE	A performance vs. quality hint.

Throws:

• DeveloperError : hint is invalid.
• DeveloperError : This CubeMap's width must be a power of two to call generateMipmap().
• DeveloperError : This CubeMap's height must be a power of two to call generateMipmap().
• DeveloperError : This CubeMap was destroyed, i.e., destroy() was called.

Example

// Generate mipmaps, and then set the sampler so mipmaps are used for
// minification when the cube map is sampled.
cubeMap.generateMipmap();
cubeMap.setSampler(context.createSampler({
  minificationFilter : Cesium.TextureMinificationFilter.NEAREST_MIPMAP_LINEAR
}));

getFlipY

Returns true if the source pixels are flipped vertically when cube-map faces are created or updated, i.e., UNPACK_FLIP_Y_WEBGL is used.

Throws:

DeveloperError : This cube map was destroyed, i.e., destroy() was called.

Returns:

Boolean True if the source pixels are flipped vertically; otherwise, false.

getHeight

Returns the height, in texels, of faces in this cube map. All faces in the same cube map have the same width and height, and the width equals the height.

Throws:

DeveloperError : This CubeMap was destroyed, i.e., destroy() was called.

Returns:

Number The height, in texels, of faces in this cube map.

getNegativeX

Returns the -x face of this cube map for modification, rendering to, etc.

Throws:

DeveloperError : This CubeMap was destroyed, i.e., destroy() was called.

Returns:

CubeMapFace The -x face of this cube map.

getNegativeY

Returns the -y face of this cube map for modification, rendering to, etc.

Throws:

DeveloperError : This CubeMap was destroyed, i.e., destroy() was called.

Returns:

CubeMapFace The -y face of this cube map.

getNegativeZ

Returns the -z face of this cube map for modification, rendering to, etc.

Throws:

DeveloperError : This CubeMap was destroyed, i.e., destroy() was called.

Returns:

CubeMapFace The -z face of this cube map.

getPixelDatatype

Returns the pixel datatype of this cube map. All faces in the same cube map have the same pixel datatype.

Throws:

DeveloperError : This CubeMap was destroyed, i.e., destroy() was called.

Returns:

PixelDatatype The pixel datatype of this cubemap.

getPixelFormat

Returns the pixel format of this cube map. All faces in the same cube map have the same pixel format.

Throws:

DeveloperError : This CubeMap was destroyed, i.e., destroy() was called.

Returns:

PixelFormat The pixel format of this cubemap.

getPositiveX

Returns the +x face of this cube map for modification, rendering to, etc.

Throws:

DeveloperError : This CubeMap was destroyed, i.e., destroy() was called.

Returns:

CubeMapFace The +x face of this cube map.

getPositiveY

Returns the +y face of this cube map for modification, rendering to, etc.

Throws:

DeveloperError : This CubeMap was destroyed, i.e., destroy() was called.

Returns:

CubeMapFace The +y face of this cube map.

getPositiveZ

Returns the +z face of this cube map for modification, rendering to, etc.

Throws:

DeveloperError : This CubeMap was destroyed, i.e., destroy() was called.

Returns:

CubeMapFace The +z face of this cube map.

getPreMultiplyAlpha

Returns true if the cubemap was created with premultiplied alpha (UNPACK_PREMULTIPLY_ALPHA_WEBGL).

Throws:

DeveloperError : This cube map was destroyed, i.e., destroy() was called.

Returns:

Boolean true if the cubemap was created with premultiplied alpha; otherwise, false.

getSampler

DOC_TBA

Throws:

DeveloperError : This CubeMap was destroyed, i.e., destroy() was called.

getWidth

Returns the width, in texels, of faces in this cube map. All faces in the same cube map have the same width and height, and the width equals the height.

Throws:

DeveloperError : This CubeMap was destroyed, i.e., destroy() was called.

Returns:

Number The width, in texels, of faces in this cube map.

isDestroyed

Returns true if this object was destroyed; otherwise, false.

If this object was destroyed, it should not be used; calling any function other than isDestroyed will result in a DeveloperError exception.

Returns:

Boolean True if this object was destroyed; otherwise, false.

See:

• CubeMap#destroy

setSampler

DOC_TBA

Parameters:

Name	Type	Argument	Description
sampler		<optional>	DOC_TBA

Throws:

DeveloperError : This CubeMap was destroyed, i.e., destroy() was called.