From a7232722ecb9113b4a31268eb8a4d16701e1f90f Mon Sep 17 00:00:00 2001
From: blueloveTH <blueloveTH@foxmail.com>
Date: Thu, 11 May 2023 21:58:08 +0800
Subject: [PATCH] ...

---
 src/mat3x3.h   | 22 +++++++++++++++-------
 src/mat3x3.pyi |  2 ++
 2 files changed, 17 insertions(+), 7 deletions(-)

diff --git a/src/mat3x3.h b/src/mat3x3.h
index 1836147c..9894907f 100644
--- a/src/mat3x3.h
+++ b/src/mat3x3.h
@@ -172,13 +172,7 @@ struct Mat3x3{
         return true;
     }
 
-    /*************** affine transform ***************/
-    bool is_affine() const{
-        float det = _11 * _22 - _12 * _21;
-        if(fabsf(det) < kEpsilon) return false;
-        return _31 == 0.0f && _32 == 0.0f && _33 == 1.0f;
-    }
-
+    /*************** affine transformations ***************/
     static Mat3x3 translate(Vec2 v){
         return Mat3x3(1.0f, 0.0f, v.x,
                       0.0f, 1.0f, v.y,
@@ -213,6 +207,12 @@ struct Mat3x3{
                       0.0f,                   0.0f,                       1.0f);
     }
 
+    bool is_affine() const{
+        float det = _11 * _22 - _12 * _21;
+        if(fabsf(det) < kEpsilon) return false;
+        return _31 == 0.0f && _32 == 0.0f && _33 == 1.0f;
+    }
+
     Mat3x3 inverse_affine() const{
         Mat3x3 ret;
         float det = _11 * _22 - _12 * _21;
@@ -593,6 +593,14 @@ struct PyMat3x3: Mat3x3{
             return VAR_T(PyMat3x3, Mat3x3::trs(t, r, s));
         });
 
+        vm->bind_func<4>(type, "ortho", [](VM* vm, ArgsView args){
+            f64 left = vm->num_to_float(args[0]);
+            f64 right = vm->num_to_float(args[1]);
+            f64 bottom = vm->num_to_float(args[2]);
+            f64 top = vm->num_to_float(args[3]);
+            return VAR_T(PyMat3x3, Mat3x3::ortho(left, right, bottom, top));
+        });
+
         vm->bind_method<0>(type, "is_affine", [](VM* vm, ArgsView args){
             PyMat3x3& self = _CAST(PyMat3x3&, args[0]);
             return VAR(self.is_affine());
diff --git a/src/mat3x3.pyi b/src/mat3x3.pyi
index 2260c496..53879114 100644
--- a/src/mat3x3.pyi
+++ b/src/mat3x3.pyi
@@ -58,6 +58,8 @@ class mat3x3:
     def ones() -> mat3x3: ...
     @staticmethod
     def identity() -> mat3x3: ...
+    @staticmethod
+    def ortho(left: float, right: float, bottom: float, top: float) -> mat3x3: ...
 
     # affine transformations    
     @staticmethod