diff options
Diffstat (limited to 'libdimension/dimension')
| -rw-r--r-- | libdimension/dimension/geometry.h | 55 |
1 files changed, 38 insertions, 17 deletions
diff --git a/libdimension/dimension/geometry.h b/libdimension/dimension/geometry.h index e1d1497..ca10163 100644 --- a/libdimension/dimension/geometry.h +++ b/libdimension/dimension/geometry.h @@ -25,24 +25,16 @@ #ifndef DIMENSION_GEOMETRY_H #define DIMENSION_GEOMETRY_H -/* Scalar and vector types. */ -typedef double dmnsn_scalar; -typedef struct { dmnsn_scalar x, y, z; } dmnsn_vector; +/* Vector and matrix types. */ -/* Shorthand for vector construction */ -dmnsn_vector dmnsn_vector_construct(dmnsn_scalar x, - dmnsn_scalar y, - dmnsn_scalar z); +typedef struct { double x, y, z; } dmnsn_vector; -/* Vector arithmetic */ - -dmnsn_vector dmnsn_vector_add(dmnsn_vector lhs, dmnsn_vector rhs); -dmnsn_vector dmnsn_vector_sub(dmnsn_vector lhs, dmnsn_vector rhs); -dmnsn_vector dmnsn_vector_mul(dmnsn_scalar lhs, dmnsn_vector rhs); -dmnsn_vector dmnsn_vector_div(dmnsn_vector lhs, dmnsn_scalar rhs); - -dmnsn_scalar dmnsn_vector_dot(dmnsn_vector lhs, dmnsn_vector rhs); -dmnsn_vector dmnsn_vector_cross(dmnsn_vector lhs, dmnsn_vector rhs); +typedef struct { + double n00, n01, n02, n03, + n10, n11, n12, n13, + n20, n21, n22, n23, + n30, n31, n32, n33; +} dmnsn_matrix; /* A line, or ray. */ typedef struct { @@ -50,7 +42,36 @@ typedef struct { dmnsn_vector n; /* A normal vector; the direction of the line */ } dmnsn_line; +/* Shorthand for vector/matrix construction */ + +dmnsn_vector dmnsn_vector_construct(double x, double y, double z); + +dmnsn_matrix dmnsn_matrix_construct(double a0, double a1, double a2, double a3, + double b0, double b1, double b2, double b3, + double c0, double c1, double c2, double c3, + double d0, double d1, double d2, double d3); +dmnsn_matrix dmnsn_translation_matrix(dmnsn_vector d); +/* theta/|theta| = axis, |theta| = angle */ +dmnsn_matrix dmnsn_rotation_matrix(dmnsn_vector theta); + +/* Vector and matrix arithmetic */ + +dmnsn_vector dmnsn_vector_add(dmnsn_vector lhs, dmnsn_vector rhs); +dmnsn_vector dmnsn_vector_sub(dmnsn_vector lhs, dmnsn_vector rhs); +dmnsn_vector dmnsn_vector_mul(double lhs, dmnsn_vector rhs); +dmnsn_vector dmnsn_vector_div(dmnsn_vector lhs, double rhs); + +double dmnsn_vector_dot(dmnsn_vector lhs, dmnsn_vector rhs); +dmnsn_vector dmnsn_vector_cross(dmnsn_vector lhs, dmnsn_vector rhs); + +double dmnsn_vector_norm(dmnsn_vector n); +dmnsn_vector dmnsn_vector_normalize(dmnsn_vector n); + +dmnsn_matrix dmnsn_matrix_mul(dmnsn_matrix lhs, dmnsn_matrix rhs); +dmnsn_vector dmnsn_matrix_vector_mul(dmnsn_matrix lhs, dmnsn_vector rhs); +dmnsn_line dmnsn_matrix_line_mul(dmnsn_matrix lhs, dmnsn_line rhs); + /* A point on a line, defined by x0 + t*n */ -dmnsn_vector dmnsn_line_point(dmnsn_line l, dmnsn_scalar t); +dmnsn_vector dmnsn_line_point(dmnsn_line l, double t); #endif /* DIMENSION_GEOMETRY_H */ |