GPUShaders::Common::Geometry Class Reference

Geometry general shader. More...

Public Member Functions
bool	intersectSphere (vec3 rayOrigin, vec3 rayDir, float radius, out vec2 roots)
bool	intersectBox (vec3 rayOrigin, vec3 rayDir, vec3 extent, out vec2 roots)
vec3	rotateY (vec3 p, vec2 csAngle)

Detailed Description

Geometry general shader.

See also

GPUShaders::Common::Constants

Member Function Documentation

intersectBox()

bool GPUShaders::Common::Geometry::intersectBox ( vec3  rayOrigin, vec3  rayDir, vec3  extent, out vec2  roots  )

inline

Check if a box of a given extent is intersected by a ray defined by an origin and a normalized direction in the frame where the box is centered and axis-aligned.

Parameters

rayOrigin	the origin of the ray
rayDir	the direction of the ray (normalized)
extent	the half size of the box in its local frame
roots	will contain the distances to the two intersections with the box

Returns

true if there is intersection.

Warning

The intersections can be in the negative direction along the ray. Check the sign of the roots to know.

intersectSphere()

bool GPUShaders::Common::Geometry::intersectSphere ( vec3  rayOrigin, vec3  rayDir, float  radius, out vec2  roots  )

inline

Check if a sphere of a given radius is intersected by a ray defined by an origin wrt to the sphere center and a normalized direction.

Parameters

rayOrigin	the origin of the ray
rayDir	the direction of the ray (normalized)
radius	the radius of the sphere to intersect
roots	will contain the two roots of the associated polynomial, ordered.

Returns

true if there is intersection.

Warning

The intersection can be in the negative direction along the ray. Check the sign of the roots to know.

rotateY()

vec3 GPUShaders::Common::Geometry::rotateY ( vec3  p, vec2  csAngle  )

inline

Rotate a point around the vertical axis.

Parameters

p	the point to trnasform
csAngle	precomputed cosine and sine of the rotation angle

Returns

the transformed point

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The documentation for this class was generated from the following file:

• resources/common/shaders/geometry.glsl