LightOmni Class

This class is used to create omni directional light sources. It is possible to modulate the light from omni light sources with a texture.

LightOmni Class

Members

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static LightOmniPtr create(const Math::vec4 & color, float attenuation_distance, const char * name = 0)

Arguments

• const Math::vec4 & color
• float attenuation_distance
• const char * name

Ptr<LightOmni> cast(const Ptr<Node> & node)

Casts a LightOmni out of the Node instance.

Arguments

• const Ptr<Node> & node - Pointer to Node.

Return value

Pointer to LightOmni.

Ptr<LightOmni> cast(const Ptr<Light> & base)

Casts a LightOmni out of the Light instance.

Arguments

• const Ptr<Light> & base - Pointer to Light.

Return value

Pointer to LightOmni.

void setAttenuationDistance(float distance)

Updates the distance from the light source shape, at which the light source doesn't illuminate anything.

Arguments

• float distance - Distance from the light source shape, at which the light source doesn't illuminate anything.

float getAttenuationDistance()

Returns the distance from the light source shape, at which the light source doesn't illuminate anything.

Return value

Distance from the light source shape, at which the light source doesn't illuminate anything.

void setImageTexture(const Ptr<Texture> & texture)

Sets the light image texture smart pointer.

Arguments

• const Ptr<Texture> & texture - Texture smart pointer.

Ptr<Texture> getImageTexture()

Gets a light image texture smart pointer.

Return value

Returns image texture smart pointer.

int setImageTextureImage(const Ptr<Image> & image, int dynamic = 0)

Sets a given Image instance as the light image texture. If you need to set a texture of all the lights in the scene, set dynamic flag to 1.

Arguments

• const Ptr<Image> & image - New texture to set.
• int dynamic - Dynamic texture flag.
  • If set to 0, changing a texture of the light instance will also affect all the lights in the scene.
  • If set to 1, an image will be successfully set only for the current light instance.

Return value

Returns 1 if the texture is set successfully; otherwise, 0.

int getImageTextureImage(const Ptr<Image> & image)

Reads the light image texture into an Image instance.

Arguments

• const Ptr<Image> & image - Image, into which the texture is read.

Return value

Returns 1 if the texture is read successfully; otherwise, 0.

void setImageTextureName(const char * name)

Updates the cube map texture used with this light source.

Arguments

• const char * name - Name (path) of the new cube map texture.

const char * getImageTextureName()

Returns the name (path) of the cubemap texture used with this light source.

Return value

Name of the cubemap texture.

void setShadowMask(int mask)

Updates the shadow mask for the omni light source. The bit mask defines shadowing of six cube map sides in the following way: positive and negative X-axis, positive and negative Y-axis, and positive and negative Z-axis. By default, no mask is applied.

Arguments

• int mask - Integer, each bit of which is used to set a mask.

int getShadowMask()

Returns the current shadow mask set for the omni light source. The bit mask defines shadowing of six cube map sides in the following way: positive and negative X-axis, positive and negative Y-axis, and positive and negative Z-axis.

Return value

Integer, each bit of which is used to set a mask.

void setShapeHeight(float height)

Updates the height of the rectangular light source.

Arguments

• float height - Height of the light source shape.

float getShapeHeight()

Returns the height of the rectangular light source.

Return value

Height of the light source shape.

void setShapeLength(float length)

Updates the length of the capsule-shaped or rectangular light source.

Arguments

• float length - Length of the light source shape.

float getShapeLength()

Returns a length of the capsule-shaped or rectangular light source.

Return value

Length of the light source shape.

void setShapeRadius(float radius)

Updates the radius of the spherical, capsule-shaped or rectangular light source.

Arguments

• float radius - Radius of the light source shape.

float getShapeRadius()

Returns a radius of the spherical, capsule-shaped or rectangular light source.

Return value

Radius of the light source shape.

void setShapeType(int type)

Updates the shape of the light source.

Arguments

• int type - Shape of the light source (one of the SHAPE_* variables).

int getShapeType()

Returns the shape of the light source.

Return value

Shape of the light source (one of the SHAPE_* variables).

Math::vec3 getSize()

Returns the size of the area illuminated by the light source. Depending on the shape type, the size varies:

• If the light is point-shaped, each component of the vector will be equal to the attenuation distance:
  Source code (C++)

  vec3(attenuation_distance)

• If the light is spherical, each component of the vector will be equal to the attenuation distance+sphere radius:
  Source code (C++)

  vec3(attenuation_distance + sphere_radius)

• If the light is capsule-shaped, the 1st component of the vector will be equal to attenuation distance+capsule length:
  Source code (C++)

  vec3(attenuation_distance + capsule_length,attenuation_distance,attenuation_distance)

• If the light is rectangular, the 2nd component of the vector will be equal to attenuation distance+rectangle height:
  Source code (C++)

  vec3(attenuation_distance,attenuation_distance + rectangle_height,attenuation_distance)

Return value

A size of the illuminated area.

int type()