jumpartifact.com_demo_0/src/3d_helpers.h
Stephen Seo 0d36747031
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Add helper fn to calc. ray/plane intersection
2023-08-07 21:39:59 +09:00

34 lines
1.2 KiB
C++

#ifndef JUMPARTIFACT_DOT_COM_DEMO_0_3D_HELPERS_H_
#define JUMPARTIFACT_DOT_COM_DEMO_0_3D_HELPERS_H_
// standard library includes
#include <optional>
// third party includes
#include <raylib.h>
extern Matrix get_identity_matrix();
extern Matrix get_rotation_matrix_about_z(float radians);
extern Matrix get_rotation_matrix_about_y(float radians);
extern Matrix get_rotation_matrix_about_x(float radians);
extern Matrix translate_matrix_x(float distance);
extern Matrix translate_matrix_y(float distance);
extern Matrix translate_matrix_z(float distance);
extern Matrix translate_matrix_xyz(float x, float y, float z);
extern Matrix scale_matrix_xyz(float x, float y, float z);
extern Matrix operator*(const Matrix &a, const Matrix &b);
/// Returns true if intersects with xz plane.
extern bool ray_to_xz_plane(const Ray &ray, float &x_out, float &z_out);
/// plane.direction is plane normal, plane.position is position on plane.
extern std::optional<Vector3> ray_to_plane(const Ray &ray, const Ray &plane);
// Unimplemented as this function isn't really needed and it exposes some
// weirdness regarding column-major matrices.
// extern Vector4 operator*(const Matrix &m, const Vector4 &v);
#endif