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Add reverse matrix multiply functions

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The *_i functions multiply the value by the matrix instead of the other
way around, then store the result.
This commit is contained in:
jp9000
2014-08-20 12:34:44 -07:00
parent cf00fc1986
commit 8d1d1ddd14
2 changed files with 62 additions and 0 deletions
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libobs/graphics/matrix4.c
+51
View File
@@ -178,6 +178,57 @@ void matrix4_scale(struct matrix4 *dst, const struct matrix4 *m,
matrix4_mul(dst, m, &temp);
}
void matrix4_translate3v_i(struct matrix4 *dst, const struct vec3 *v,
const struct matrix4 *m)
{
struct matrix4 temp;
vec4_set(&temp.x, 1.0f, 0.0f, 0.0f, 0.0f);
vec4_set(&temp.y, 0.0f, 1.0f, 0.0f, 0.0f);
vec4_set(&temp.z, 0.0f, 0.0f, 1.0f, 0.0f);
vec4_from_vec3(&temp.t, v);
matrix4_mul(dst, &temp, m);
}
void matrix4_translate4v_i(struct matrix4 *dst, const struct vec4 *v,
const struct matrix4 *m)
{
struct matrix4 temp;
vec4_set(&temp.x, 1.0f, 0.0f, 0.0f, 0.0f);
vec4_set(&temp.y, 0.0f, 1.0f, 0.0f, 0.0f);
vec4_set(&temp.z, 0.0f, 0.0f, 1.0f, 0.0f);
vec4_copy(&temp.t, v);
matrix4_mul(dst, &temp, m);
}
void matrix4_rotate_i(struct matrix4 *dst, const struct quat *q,
const struct matrix4 *m)
{
struct matrix4 temp;
matrix4_from_quat(&temp, q);
matrix4_mul(dst, &temp, m);
}
void matrix4_rotate_aa_i(struct matrix4 *dst, const struct axisang *aa,
const struct matrix4 *m)
{
struct matrix4 temp;
matrix4_from_axisang(&temp, aa);
matrix4_mul(dst, &temp, m);
}
void matrix4_scale_i(struct matrix4 *dst, const struct vec3 *v,
const struct matrix4 *m)
{
struct matrix4 temp;
vec4_set(&temp.x, v->x, 0.0f, 0.0f, 0.0f);
vec4_set(&temp.y, 0.0f, v->y, 0.0f, 0.0f);
vec4_set(&temp.z, 0.0f, 0.0f, v->z, 0.0f);
vec4_set(&temp.t, 0.0f, 0.0f, 0.0f, 1.0f);
matrix4_mul(dst, &temp, m);
}
bool matrix4_inv(struct matrix4 *dst, const struct matrix4 *m)
{
struct vec4 *dstv = (struct vec4 *)dst;
libobs/graphics/matrix4.h
+11
View File
@@ -76,6 +76,17 @@ EXPORT void matrix4_scale(struct matrix4 *dst, const struct matrix4 *m,
EXPORT bool matrix4_inv(struct matrix4 *dst, const struct matrix4 *m);
EXPORT void matrix4_transpose(struct matrix4 *dst, const struct matrix4 *m);
EXPORT void matrix4_translate3v_i(struct matrix4 *dst, const struct vec3 *v,
const struct matrix4 *m);
EXPORT void matrix4_translate4v_i(struct matrix4 *dst, const struct vec4 *v,
const struct matrix4 *m);
EXPORT void matrix4_rotate_i(struct matrix4 *dst, const struct quat *q,
const struct matrix4 *m);
EXPORT void matrix4_rotate_aa_i(struct matrix4 *dst, const struct axisang *aa,
const struct matrix4 *m);
EXPORT void matrix4_scale_i(struct matrix4 *dst, const struct vec3 *v,
const struct matrix4 *m);
static inline void matrix4_translate3f(struct matrix4 *dst,
const struct matrix4 *m, float x, float y, float z)
{