From e11b33fec33392640e74b9f180572fc0a504287e Mon Sep 17 00:00:00 2001
From: Richard Antalik <richardantalik@gmail.com>
Date: Fri, 15 Oct 2021 23:02:08 +0200
Subject: Remove math for 2D affine transform

Commit e1665c3d3190 added math to do 2D affine transformations with 3x3
matrices, but these matrices are also used for 3D transformations.

Remove added functions and use 4x4 matrices for 2D transformation.

Reviewed By: campbellbarton

Differential Revision: https://developer.blender.org/D12510
---
 source/blender/blenlib/intern/math_matrix.c | 53 -----------------------------
 1 file changed, 53 deletions(-)

(limited to 'source/blender/blenlib/intern')

diff --git a/source/blender/blenlib/intern/math_matrix.c b/source/blender/blenlib/intern/math_matrix.c
index b605c3eeead..554506e90e7 100644
--- a/source/blender/blenlib/intern/math_matrix.c
+++ b/source/blender/blenlib/intern/math_matrix.c
@@ -2338,12 +2338,6 @@ void scale_m4_fl(float R[4][4], float scale)
   R[3][0] = R[3][1] = R[3][2] = 0.0;
 }
 
-void translate_m3(float mat[3][3], float tx, float ty)
-{
-  mat[2][0] += (tx * mat[0][0] + ty * mat[1][0]);
-  mat[2][1] += (tx * mat[0][1] + ty * mat[1][1]);
-}
-
 void translate_m4(float mat[4][4], float Tx, float Ty, float Tz)
 {
   mat[3][0] += (Tx * mat[0][0] + Ty * mat[1][0] + Tz * mat[2][0]);
@@ -2351,18 +2345,6 @@ void translate_m4(float mat[4][4], float Tx, float Ty, float Tz)
   mat[3][2] += (Tx * mat[0][2] + Ty * mat[1][2] + Tz * mat[2][2]);
 }
 
-void rotate_m3(float mat[3][3], const float angle)
-{
-  const float angle_cos = cosf(angle);
-  const float angle_sin = sinf(angle);
-
-  for (int col = 0; col < 3; col++) {
-    float temp = angle_cos * mat[0][col] + angle_sin * mat[1][col];
-    mat[1][col] = -angle_sin * mat[0][col] + angle_cos * mat[1][col];
-    mat[0][col] = temp;
-  }
-}
-
 /* TODO: enum for axis? */
 /**
  * Rotate a matrix in-place.
@@ -2408,12 +2390,6 @@ void rotate_m4(float mat[4][4], const char axis, const float angle)
   }
 }
 
-void rescale_m3(float mat[3][3], const float scale[2])
-{
-  mul_v3_fl(mat[0], scale[0]);
-  mul_v3_fl(mat[1], scale[1]);
-}
-
 /** Scale a matrix in-place. */
 void rescale_m4(float mat[4][4], const float scale[3])
 {
@@ -2444,20 +2420,6 @@ void transform_pivot_set_m4(float mat[4][4], const float pivot[3])
   mul_m4_m4m4(mat, mat, tmat);
 }
 
-void transform_pivot_set_m3(float mat[3][3], const float pivot[2])
-{
-  float tmat[3][3];
-
-  unit_m3(tmat);
-
-  copy_v2_v2(tmat[2], pivot);
-  mul_m3_m3m3(mat, tmat, mat);
-
-  /* invert the matrix */
-  negate_v2(tmat[2]);
-  mul_m3_m3m3(mat, mat, tmat);
-}
-
 void blend_m3_m3m3(float out[3][3],
                    const float dst[3][3],
                    const float src[3][3],
@@ -2637,21 +2599,6 @@ bool equals_m4m4(const float mat1[4][4], const float mat2[4][4])
           equals_v4v4(mat1[2], mat2[2]) && equals_v4v4(mat1[3], mat2[3]));
 }
 
-/**
- * Make a 3x3 matrix out of 3 transform components.
- * Matrices are made in the order: `loc * rot * scale`
- */
-void loc_rot_size_to_mat3(float R[3][3],
-                          const float loc[2],
-                          const float angle,
-                          const float size[2])
-{
-  unit_m3(R);
-  translate_m3(R, loc[0], loc[1]);
-  rotate_m3(R, angle);
-  rescale_m3(R, size);
-}
-
 /**
  * Make a 4x4 matrix out of 3 transform components.
  * Matrices are made in the order: `scale * rot * loc`
-- 
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