Module graphics::math [−] [src]

Various methods for computing with vectors.

Functions

 abs_transform Transforms from normalized to absolute coordinates. add Adds two vectors. area Computes area of a simple polygon. area_centroid Computes the area and centroid of a simple polygon. cast Converts to another vector type. centroid Computes centroid of a simple polygon. cross Computes the cross product. dot Computes the dot product. from_barycentric Transforms from barycentric coordinates to cartesian. get_scale Extract scale information from matrix. hsv Transform color with hue, saturation and value. identity Create an identity matrix. inside_triangle Returns true if point is inside triangle. least_separation_4 Returns the least separation out of four. Each seperation can be computed using separation function. The separation returned can be used to solve collision of rectangles. line_side Returns a number that tells which side it is relative to a line. margin_rectangle Shrinks a rectangle by a factor on all sides. modular_offset Computes modular offset safely for numbers. mul Multiplies two vectors component wise. mul_scalar Multiplies the vector with a scalar. multiply Multiplies two matrices. orient Orients x axis to look at point. overlap_rectangle Computes overlap between two rectangles. The area of the overlapping rectangle is positive. A shared edge or corner is not considered overlap. perp Creates a perpendicular vector. relative_rectangle Computes a relative rectangle using the rectangle as a tile. relative_source_rectangle Computes a relative source rectangle using the source rectangle as a tile. rotate_radians Creates a rotation matrix. scale Create a scale matrix. separation Compute the shortest vector from point to ray. A ray stores starting point and directional vector. shear Create a shear matrix. square_len Computes the square length of a vector. sub Subtracts 'b' from 'a'. to_barycentric Transforms from cartesian coordinates to barycentric. transform_pos Transforms a 2D position through matrix. transform_vec Transforms a 2D vector through matrix. translate Creates a translation matrix. triangle_face Returns true if triangle is clockwise.

Type Definitions

 Matrix2d The type used for matrices. Scalar The type used for scalars. Vec2d The type used for 2D vectors. Vec3d The type used for 3D vectors.