diff options
Diffstat (limited to 'source/blender/blenlib/intern/arithb.c')
| -rw-r--r-- | source/blender/blenlib/intern/arithb.c | 60 |
1 files changed, 43 insertions, 17 deletions
diff --git a/source/blender/blenlib/intern/arithb.c b/source/blender/blenlib/intern/arithb.c index 9e769e19674..26bbbf040f3 100644 --- a/source/blender/blenlib/intern/arithb.c +++ b/source/blender/blenlib/intern/arithb.c @@ -2187,23 +2187,40 @@ void VecMulVecf(float *v, float *v1, float *v2) v[2] = v1[2] * v2[2]; } -void VecLerpf(float *target, float *a, float *b, float t) +void VecLerpf(float *target, const float *a, const float *b, const float t) { - float s = 1.0f-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]; } -void Vec2Lerpf(float *target, float *a, float *b, float t) +void Vec2Lerpf(float *target, const float *a, const float *b, const float t) { - float s = 1.0f-t; + const float s = 1.0f-t; target[0]= s*a[0] + t*b[0]; target[1]= s*a[1] + t*b[1]; } +/* weight 3 vectors, (VecWeightf in 2.4x) + * 'w' must be unit length but is not a vector, just 3 weights */ +void VecLerp3f(float p[3], const float v1[3], const float v2[3], const float v3[3], const float w[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]; + p[2] = v1[2]*w[0] + v2[2]*w[1] + v3[2]*w[2]; +} + +/* weight 3 2D vectors, (Vec2Weightf in 2.4x) + * 'w' must be unit length but is not a vector, just 3 weights */ +void Vec2Lerp3f(float p[2], const float v1[2], const float v2[2], const float v3[2], const float w[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]; +} + void VecMidf(float *v, float *v1, float *v2) { v[0]= 0.5f*(v1[0]+ v2[0]); @@ -3548,10 +3565,10 @@ float VecAngle3(float *v1, float *v2, float *v3) Normalize(vec1); Normalize(vec2); - return NormalizedVecAngle2(vec1, vec2) * (float)(180.0/M_PI); + return NormalizedVecAngle2(vec1, vec2); } -float VecAngle3_2D(float *v1, float *v2, float *v3) +float Vec2Angle3(float *v1, float *v2, float *v3) { float vec1[2], vec2[2]; @@ -3564,7 +3581,7 @@ float VecAngle3_2D(float *v1, float *v2, float *v3) Normalize2(vec1); Normalize2(vec2); - return NormalizedVecAngle2_2D(vec1, vec2) * (float)(180.0/M_PI); + return NormalizedVecAngle2_2D(vec1, vec2); } /* Return the shortest angle in degrees between the 2 vectors */ @@ -3577,7 +3594,7 @@ float VecAngle2(float *v1, float *v2) Normalize(vec1); Normalize(vec2); - return NormalizedVecAngle2(vec1, vec2)* (float)(180.0/M_PI); + return NormalizedVecAngle2(vec1, vec2); } float NormalizedVecAngle2(float *v1, float *v2) @@ -4093,19 +4110,19 @@ void spheremap(float x, float y, float z, float *u, float *v) /* proposed api by ton and zr, not used yet */ #if 0 /* ***************** m1 = m2 ***************** */ -void cpy_m3_m3(float m1[][3], float m2[][3]) +static void cpy_m3_m3(float m1[][3], float m2[][3]) { memcpy(m1[0], m2[0], 9*sizeof(float)); } /* ***************** m1 = m2 ***************** */ -void cpy_m4_m4(float m1[][4], float m2[][4]) +static void cpy_m4_m4(float m1[][4], float m2[][4]) { memcpy(m1[0], m2[0], 16*sizeof(float)); } /* ***************** identity matrix ***************** */ -void ident_m4(float m[][4]) +static void ident_m4(float m[][4]) { m[0][0]= m[1][1]= m[2][2]= m[3][3]= 1.0; @@ -4116,7 +4133,7 @@ void ident_m4(float m[][4]) } /* ***************** m1 = m2 (pre) * m3 (post) ***************** */ -void mul_m3_m3m3(float m1[][3], float m2[][3], float m3[][3]) +static void mul_m3_m3m3(float m1[][3], float m2[][3], float m3[][3]) { float m[3][3]; @@ -4136,7 +4153,7 @@ void mul_m3_m3m3(float m1[][3], float m2[][3], float m3[][3]) } /* ***************** m1 = m2 (pre) * m3 (post) ***************** */ -void mul_m4_m4m4(float m1[][4], float m2[][4], float m3[][4]) +static void mul_m4_m4m4(float m1[][4], float m2[][4], float m3[][4]) { float m[4][4]; @@ -4164,7 +4181,7 @@ void mul_m4_m4m4(float m1[][4], float m2[][4], float m3[][4]) } /* ***************** m1 = inverse(m2) ***************** */ -void inv_m3_m3(float m1[][3], float m2[][3]) +static void inv_m3_m3(float m1[][3], float m2[][3]) { short a,b; float det; @@ -4187,7 +4204,7 @@ void inv_m3_m3(float m1[][3], float m2[][3]) } /* ***************** m1 = inverse(m2) ***************** */ -int inv_m4_m4(float inverse[][4], float mat[][4]) +static int inv_m4_m4(float inverse[][4], float mat[][4]) { int i, j, k; double temp; @@ -4240,7 +4257,7 @@ int inv_m4_m4(float inverse[][4], float mat[][4]) } /* ***************** v1 = v2 * mat ***************** */ -void mul_v3_v3m4(float *v1, float *v2, float mat[][4]) +static void mul_v3_v3m4(float *v1, float *v2, float mat[][4]) { float x, y; @@ -4715,7 +4732,7 @@ int LineIntersectLine(float v1[3], float v2[3], float v3[3], float v4[3], float VecSubf(c, v3t, v1); VecSubf(a, v2, v1); - VecSubf(b, v4t, v3); + VecSubf(b, v4t, v3t); Crossf(ab, a, b); Crossf(cb, c, b); @@ -4823,6 +4840,15 @@ static float lambda_cp_line(float p[3], float l1[3], float l2[3]) } #endif +/* useful to calculate an even width shell, by taking the angle between 2 planes. + * The return value is a scale on the offset. + * no angle between planes is 1.0, as the angle between the 2 planes approches 180d + * the distance gets very high, 180d would be inf, but this case isn't valid */ +float AngleToLength(const float angle) +{ + return (angle < SMALL_NUMBER) ? 1.0f : fabsf(1.0f / cosf(angle * (M_PI/180.0f))); +} + /* Similar to LineIntersectsTriangleUV, except it operates on a quad and in 2d, assumes point is in quad */ void PointInQuad2DUV(float v0[2], float v1[2], float v2[2], float v3[2], float pt[2], float *uv) { |