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cogl/matrix: Translate using Graphene

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Georges Basile Stavracas Neto 2019-03-01 13:28:13 -03:00
parent 7f708ce39e
commit 2ed596088f
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GPG Key ID: 886C17EE170D1385
1 changed files with 6 additions and 18 deletions
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24
cogl/cogl/cogl-matrix.c
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@ -276,30 +276,18 @@ cogl_matrix_scale (CoglMatrix *matrix,
_COGL_MATRIX_DEBUG_PRINT (matrix);
}
/*
* Multiply a matrix with a translation matrix.
*
* Adds the translation coordinates to the elements of matrix in-place. Marks
* the MAT_FLAG_TRANSLATION flag, and the MAT_DIRTY_TYPE and MAT_DIRTY_INVERSE
* dirty flags.
*/
static void
_cogl_matrix_translate (CoglMatrix *matrix, float x, float y, float z)
{
float *m = (float *)matrix;
m[12] = m[0] * x + m[4] * y + m[8] * z + m[12];
m[13] = m[1] * x + m[5] * y + m[9] * z + m[13];
m[14] = m[2] * x + m[6] * y + m[10] * z + m[14];
m[15] = m[3] * x + m[7] * y + m[11] * z + m[15];
}
void
cogl_matrix_translate (CoglMatrix *matrix,
float x,
float y,
float z)
{
_cogl_matrix_translate (matrix, x, y, z);
graphene_matrix_t m;
cogl_matrix_to_graphene_matrix (matrix, &m);
graphene_matrix_translate (&m, &GRAPHENE_POINT3D_INIT (x, y, z));
graphene_matrix_to_cogl_matrix (&m, matrix);
_COGL_MATRIX_DEBUG_PRINT (matrix);
}