class: GrapheneTriangleLayout

[12:14] static extends: object

Generated struct layout helper for GIR record Triangle.

Methods

layout ()

Returns the Panama struct layout for Triangle.

class: GrapheneTriangle

[29:7] extends: object

A triangle.

Members

handleObj
lib
retainedCallbacks
signalHandlerNames
signalSetterHandlers

Methods

GrapheneTriangle (Handle = null)

Allocates a new #graphene_triangle_t. The contents of the returned structure are undefined.
- @p Handle is an optional native handle or wrapper whose handle to adopt; when the native constructor is called.
toNativeHandle (Source)

Normalizes a constructor argument into a raw pointer carrier. Accepts a raw NativeHandle, a raw NativeBuffer returned from fn.call(...), another generated wrapper exposing handle(), or null. Returns null when the argument carries no pointer.
- @p Source is the raw handle, raw buffer, wrapper, or null.
- @r A raw pointer carrier or null when no pointer is present.
getLib ()

Returns the opened native library for this generated wrapper.
- @r The opened native library.
handle ()

Returns the wrapped NativeHandle.
- @r The wrapped NativeHandle.
isNull ()

Returns true when the wrapped handle is null.
- @r A bool.
describe ()

Returns a small string for debugging generated wrappers.
- @r A string.
contains_point (object p)

Checks whether the given triangle @t contains the point @p.
- @p p is a #graphene_point3d_t.
- @r true if the point is inside the triangle.
equal (object b)

Checks whether the two given #graphene_triangle_t are equal.
- @p b is a #graphene_triangle_t.
- @r true if the triangles are equal.
free ()

Frees the resources allocated by graphene_triangle_alloc().
- @r None.
get_area ()

Computes the area of the given #graphene_triangle_t.
- @r the area of the triangle.
get_barycoords (object p)

Computes the barycentric coordinates of the given point @p. The point @p must lie on the same plane as the triangle @t; if the point is not coplanar, the result of this function is undefined. If we place the origin in the coordinates of the triangle's A point, the barycentric coordinates are u, which is on the AC vector; and v which is on the AB vector: The returned #graphene_vec2_t contains the following values, in order: - res.x = u - res.y = v
- @p p is a #graphene_point3d_t.
- @p res is return location for the vector with the barycentric coordinates.
- @r true if the barycentric coordinates are valid.
get_bounding_box ()

Computes the bounding box of the given #graphene_triangle_t.
- @p res is return location for the box.
- @r None.
get_midpoint ()

Computes the coordinates of the midpoint of the given #graphene_triangle_t. The midpoint G is the centroid of the triangle, i.e. the intersection of its medians.
- @p res is return location for the coordinates of the midpoint.
- @r None.
get_normal ()

Computes the normal vector of the given #graphene_triangle_t.
- @p res is return location for the normal vector.
- @r None.
get_plane ()

Computes the plane based on the vertices of the given #graphene_triangle_t.
- @p res is return location for the plane.
- @r None.
get_points ()

Retrieves the three vertices of the given #graphene_triangle_t and returns their coordinates as #graphene_point3d_t.
- @p a is return location for the coordinates of the first vertex.
- @p b is return location for the coordinates of the second vertex.
- @p c is return location for the coordinates of the third vertex.
- @r None.
get_uv (object p, object uv_a, object uv_b, object uv_c)

Computes the UV coordinates of the given point @p. The point @p must lie on the same plane as the triangle @t; if the point is not coplanar, the result of this function is undefined. If @p is %NULL, the point will be set in (0, 0, 0). The UV coordinates will be placed in the @res vector: - res.x = u - res.y = v See also: graphene_triangle_get_barycoords()
- @p p is a #graphene_point3d_t.
- @p uv_a is the UV coordinates of the first point.
- @p uv_b is the UV coordinates of the second point.
- @p uv_c is the UV coordinates of the third point.
- @p res is a vector containing the UV coordinates of the given point @p.
- @r true if the coordinates are valid.
get_vertices ()

Retrieves the three vertices of the given #graphene_triangle_t.
- @p a is return location for the first vertex.
- @p b is return location for the second vertex.
- @p c is return location for the third vertex.
- @r None.
init_from_float (list a, list b, list c)

Initializes a #graphene_triangle_t using the three given arrays of floating point values, each representing the coordinates of a point in 3D space.
- @p a is an array of 3 floating point values.
- @p b is an array of 3 floating point values.
- @p c is an array of 3 floating point values.
- @r the initialized #graphene_triangle_t.
init_from_point3d (object a, object b, object c)

Initializes a #graphene_triangle_t using the three given 3D points.
- @p a is a #graphene_point3d_t.
- @p b is a #graphene_point3d_t.
- @p c is a #graphene_point3d_t.
- @r the initialized #graphene_triangle_t.
init_from_vec3 (object a, object b, object c)

Initializes a #graphene_triangle_t using the three given vectors.
- @p a is a #graphene_vec3_t.
- @p b is a #graphene_vec3_t.
- @p c is a #graphene_vec3_t.
- @r the initialized #graphene_triangle_t.