frillrun/include/cglm/curve.h

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2024-08-24 04:47:58 +00:00
/*
* Copyright (c), Recep Aslantas.
*
* MIT License (MIT), http://opensource.org/licenses/MIT
* Full license can be found in the LICENSE file
*/
#ifndef cglm_curve_h
#define cglm_curve_h
#include "common.h"
#include "vec4.h"
#include "mat4.h"
/*!
* @brief helper function to calculate S*M*C multiplication for curves
*
* This function does not encourage you to use SMC,
* instead it is a helper if you use SMC.
*
* if you want to specify S as vector then use more generic glm_mat4_rmc() func.
*
* Example usage:
* B(s) = glm_smc(s, GLM_BEZIER_MAT, (vec4){p0, c0, c1, p1})
*
* @param[in] s parameter between 0 and 1 (this will be [s3, s2, s, 1])
* @param[in] m basis matrix
* @param[in] c position/control vector
*
* @return B(s)
*/
CGLM_INLINE
float
glm_smc(float s, mat4 m, vec4 c) {
vec4 vs;
glm_vec4_cubic(s, vs);
return glm_mat4_rmc(vs, m, c);
}
#endif /* cglm_curve_h */