Welcome to mirror list, hosted at ThFree Co, Russian Federation.

git.blender.org/blender.git - Unnamed repository; edit this file 'description' to name the repository.
summaryrefslogtreecommitdiff
path: root/source/blender/blenlib/intern/math_vector.c
diff options
context:
space:
mode:
Diffstat (limited to 'source/blender/blenlib/intern/math_vector.c')
-rw-r--r--source/blender/blenlib/intern/math_vector.c102
1 files changed, 51 insertions, 51 deletions
diff --git a/source/blender/blenlib/intern/math_vector.c b/source/blender/blenlib/intern/math_vector.c
index dc6e213d0b5..4d7efa4b6f4 100644
--- a/source/blender/blenlib/intern/math_vector.c
+++ b/source/blender/blenlib/intern/math_vector.c
@@ -30,40 +30,40 @@
//******************************* Interpolation *******************************/
-void interp_v2_v2v2(float target[2], const float a[2], const float b[2], const float t)
+void interp_v2_v2v2(float r[2], const float a[2], const float b[2], const float t)
{
const float s = 1.0f - t;
- target[0] = s * a[0] + t * b[0];
- target[1] = s * a[1] + t * b[1];
+ r[0] = s * a[0] + t * b[0];
+ r[1] = s * a[1] + t * b[1];
}
/* weight 3 2D vectors,
* 'w' must be unit length but is not a vector, just 3 weights */
void interp_v2_v2v2v2(
- float p[2], const float v1[2], const float v2[2], const float v3[2], const float w[3])
+ float r[2], const float a[2], const float b[2], const float c[2], const float t[3])
{
- p[0] = v1[0] * w[0] + v2[0] * w[1] + v3[0] * w[2];
- p[1] = v1[1] * w[0] + v2[1] * w[1] + v3[1] * w[2];
+ r[0] = a[0] * t[0] + b[0] * t[1] + c[0] * t[2];
+ r[1] = a[1] * t[0] + b[1] * t[1] + c[1] * t[2];
}
-void interp_v3_v3v3(float target[3], const float a[3], const float b[3], const float t)
+void interp_v3_v3v3(float r[3], const float a[3], const float b[3], const float t)
{
const float s = 1.0f - t;
- target[0] = s * a[0] + t * b[0];
- target[1] = s * a[1] + t * b[1];
- target[2] = s * a[2] + t * b[2];
+ r[0] = s * a[0] + t * b[0];
+ r[1] = s * a[1] + t * b[1];
+ r[2] = s * a[2] + t * b[2];
}
-void interp_v4_v4v4(float target[4], const float a[4], const float b[4], const float t)
+void interp_v4_v4v4(float r[4], const float a[4], const float b[4], const float t)
{
const float s = 1.0f - t;
- target[0] = s * a[0] + t * b[0];
- target[1] = s * a[1] + t * b[1];
- target[2] = s * a[2] + t * b[2];
- target[3] = s * a[3] + t * b[3];
+ r[0] = s * a[0] + t * b[0];
+ r[1] = s * a[1] + t * b[1];
+ r[2] = s * a[2] + t * b[2];
+ r[3] = s * a[3] + t * b[3];
}
/**
@@ -267,17 +267,17 @@ void interp_v4_v4v4_char(char target[4], const char a[4], const char b[4], const
interp_v4_v4v4_uchar((uchar *)target, (const uchar *)a, (const uchar *)b, t);
}
-void mid_v3_v3v3(float v[3], const float v1[3], const float v2[3])
+void mid_v3_v3v3(float r[3], const float a[3], const float b[3])
{
- v[0] = 0.5f * (v1[0] + v2[0]);
- v[1] = 0.5f * (v1[1] + v2[1]);
- v[2] = 0.5f * (v1[2] + v2[2]);
+ r[0] = 0.5f * (a[0] + b[0]);
+ r[1] = 0.5f * (a[1] + b[1]);
+ r[2] = 0.5f * (a[2] + b[2]);
}
-void mid_v2_v2v2(float v[2], const float v1[2], const float v2[2])
+void mid_v2_v2v2(float r[2], const float a[2], const float b[2])
{
- v[0] = 0.5f * (v1[0] + v2[0]);
- v[1] = 0.5f * (v1[1] + v2[1]);
+ r[0] = 0.5f * (a[0] + b[0]);
+ r[1] = 0.5f * (a[1] + b[1]);
}
void mid_v3_v3v3v3(float v[3], const float v1[3], const float v2[3], const float v3[3])
@@ -408,12 +408,12 @@ bool is_finite_v4(const float v[4])
* note that when v1/v2/v3 represent 3 points along a straight line
* that the angle returned will be pi (180deg), rather then 0.0
*/
-float angle_v3v3v3(const float v1[3], const float v2[3], const float v3[3])
+float angle_v3v3v3(const float a[3], const float b[3], const float c[3])
{
float vec1[3], vec2[3];
- sub_v3_v3v3(vec1, v2, v1);
- sub_v3_v3v3(vec2, v2, v3);
+ sub_v3_v3v3(vec1, b, a);
+ sub_v3_v3v3(vec2, b, c);
normalize_v3(vec1);
normalize_v3(vec2);
@@ -434,25 +434,25 @@ float cos_v3v3v3(const float p1[3], const float p2[3], const float p3[3])
}
/* Return the shortest angle in radians between the 2 vectors */
-float angle_v3v3(const float v1[3], const float v2[3])
+float angle_v3v3(const float a[3], const float b[3])
{
float vec1[3], vec2[3];
- normalize_v3_v3(vec1, v1);
- normalize_v3_v3(vec2, v2);
+ normalize_v3_v3(vec1, a);
+ normalize_v3_v3(vec2, b);
return angle_normalized_v3v3(vec1, vec2);
}
-float angle_v2v2v2(const float v1[2], const float v2[2], const float v3[2])
+float angle_v2v2v2(const float a[2], const float b[2], const float c[2])
{
float vec1[2], vec2[2];
- vec1[0] = v2[0] - v1[0];
- vec1[1] = v2[1] - v1[1];
+ vec1[0] = b[0] - a[0];
+ vec1[1] = b[1] - a[1];
- vec2[0] = v2[0] - v3[0];
- vec2[1] = v2[1] - v3[1];
+ vec2[0] = b[0] - c[0];
+ vec2[1] = b[1] - c[1];
normalize_v2(vec1);
normalize_v2(vec2);
@@ -474,15 +474,15 @@ float cos_v2v2v2(const float p1[2], const float p2[2], const float p3[2])
}
/* Return the shortest angle in radians between the 2 vectors */
-float angle_v2v2(const float v1[2], const float v2[2])
+float angle_v2v2(const float a[2], const float b[2])
{
float vec1[2], vec2[2];
- vec1[0] = v1[0];
- vec1[1] = v1[1];
+ vec1[0] = a[0];
+ vec1[1] = a[1];
- vec2[0] = v2[0];
- vec2[1] = v2[1];
+ vec2[0] = b[0];
+ vec2[1] = b[1];
normalize_v2(vec1);
normalize_v2(vec2);
@@ -512,20 +512,20 @@ float angle_normalized_v3v3(const float v1[3], const float v2[3])
return (float)M_PI - 2.0f * saasin(len_v3v3(v1, v2_n) / 2.0f);
}
-float angle_normalized_v2v2(const float v1[2], const float v2[2])
+float angle_normalized_v2v2(const float a[2], const float b[2])
{
/* double check they are normalized */
- BLI_ASSERT_UNIT_V2(v1);
- BLI_ASSERT_UNIT_V2(v2);
+ BLI_ASSERT_UNIT_V2(a);
+ BLI_ASSERT_UNIT_V2(b);
/* this is the same as acos(dot_v3v3(v1, v2)), but more accurate */
- if (dot_v2v2(v1, v2) >= 0.0f) {
- return 2.0f * saasin(len_v2v2(v1, v2) / 2.0f);
+ if (dot_v2v2(a, b) >= 0.0f) {
+ return 2.0f * saasin(len_v2v2(a, b) / 2.0f);
}
float v2_n[2];
- negate_v2_v2(v2_n, v2);
- return (float)M_PI - 2.0f * saasin(len_v2v2(v1, v2_n) / 2.0f);
+ negate_v2_v2(v2_n, b);
+ return (float)M_PI - 2.0f * saasin(len_v2v2(a, v2_n) / 2.0f);
}
/**
@@ -766,16 +766,16 @@ void project_v3_plane(float out[3], const float plane_no[3], const float plane_c
sub_v3_v3(out, vector);
}
-/* Returns a vector bisecting the angle at v2 formed by v1, v2 and v3 */
-void bisect_v3_v3v3v3(float out[3], const float v1[3], const float v2[3], const float v3[3])
+/* Returns a vector bisecting the angle at b formed by a, b and c */
+void bisect_v3_v3v3v3(float r[3], const float a[3], const float b[3], const float c[3])
{
float d_12[3], d_23[3];
- sub_v3_v3v3(d_12, v2, v1);
- sub_v3_v3v3(d_23, v3, v2);
+ sub_v3_v3v3(d_12, b, a);
+ sub_v3_v3v3(d_23, c, b);
normalize_v3(d_12);
normalize_v3(d_23);
- add_v3_v3v3(out, d_12, d_23);
- normalize_v3(out);
+ add_v3_v3v3(r, d_12, d_23);
+ normalize_v3(r);
}
/**
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-09 11:59:33 +0300