Add generic math module.

1 files changed, 127 insertions, 0 deletions

diff --git a/catbird/math.scm b/catbird/math.scm
new file mode 100644
index 0000000..cca718d
--- /dev/null
+++ b/catbird/math.scm
@@ -0,0 +1,127 @@
+;;; Catbird Game Engine
+;;; Copyright © 2023 David Thompson <davet@gnu.org>
+;;;
+;;; Catbird is free software: you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation, either version 3 of the License, or
+;;; (at your option) any later version.
+;;;
+;;; Catbird is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+;;; General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with Catbird.  If not, see <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+;;
+;; Generic math methods.
+;;
+;;; Code:
+(define-module (catbird math)
+  #:use-module (chickadee math matrix)
+  #:use-module (chickadee math vector)
+  #:use-module (oop goops)
+  #:export (<vec2>
+            <vec3>
+            <matrix3>
+            <matrix4>
+            vec))
+
+(define <vec2> (class-of (vec2 0.0 0.0)))
+(define <vec3> (class-of (vec3 0.0 0.0 0.0)))
+(define <matrix3> (class-of (make-identity-matrix3)))
+(define <matrix4> (class-of (make-identity-matrix4)))
+
+(define-method (vec (x <number>) (y <number>))
+  (vec2 x y))
+
+(define-method (vec (x <number>) (y <number>) (z <number>))
+  (vec3 x y z))
+
+(define-method (vec (v <vec2>) (z <number>))
+  (vec3 (vec2-x v) (vec2-y v) z))
+
+(define-method (vec (x <number>) (v <vec2>))
+  (vec3 x (vec2-x v) (vec2-y v)))
+
+(define-method (+ (a <vec2>) (b <vec2>))
+  (vec2+ a b))
+
+(define-method (+ (a <vec2>) (b <number>))
+  (vec2+ a b))
+
+(define-method (+ (a <number>) (b <vec2>))
+  (vec2+ b a))
+
+(define-method (+ (a <vec3>) (b <vec3>))
+  (vec3+ a b))
+
+(define-method (+ (a <vec3>) (b <number>))
+  (vec3+ a b))
+
+(define-method (+ (a <number>) (b <vec3>))
+  (vec3+ b a))
+
+(define-method (- (a <vec2>) (b <vec2>))
+  (vec2- a b))
+
+(define-method (- (a <vec2>) (b <number>))
+  (vec2- a b))
+
+(define-method (- (a <vec3>) (b <vec3>))
+  (vec3- a b))
+
+(define-method (- (a <vec3>) (b <number>))
+  (vec3- a b))
+
+(define-method (* (a <vec2>) (b <vec2>))
+  (vec2* a b))
+
+(define-method (* (a <vec2>) (b <number>))
+  (vec2* a b))
+
+(define-method (* (a <number>) (b <vec2>))
+  (vec2* b a))
+
+(define-method (* (a <vec3>) (b <vec3>))
+  (vec3* a b))
+
+(define-method (* (a <vec3>) (b <number>))
+  (vec3* a b))
+
+(define-method (* (a <number>) (b <vec3>))
+  (vec3* b a))
+
+(define-method (* (a <matrix3>) (b <matrix3>))
+  (matrix3* a b))
+
+(define-method (* (a <matrix4>) (b <matrix4>))
+  (matrix4* a b))
+
+(define-method (/ (a <vec2>) (b <vec2>))
+  (vec2* a (vec2 (/ 1.0 (vec2-x b))
+                 (/ 1.0 (vec2-y b)))))
+
+(define-method (/ (a <vec2>) (b <number>))
+  (vec2* a (/ 1.0 b)))
+
+(define-method (/ (a <number>) (b <vec2>))
+  (vec2* (vec2 (/ 1.0 (vec2-x b))
+               (/ 1.0 (vec2-y b)))
+         b))
+
+(define-method (/ (a <vec3>) (b <vec3>))
+  (vec3* a (vec3 (/ 1.0 (vec3-x b))
+                 (/ 1.0 (vec3-y b))
+                 (/ 1.0 (vec3-z b)))))
+
+(define-method (/ (a <vec3>) (b <number>))
+  (vec3* a (/ 1.0 b)))
+
+(define-method (/ (a <number>) (b <vec3>))
+  (vec3* (vec3 (/ 1.0 (vec3-x b))
+               (/ 1.0 (vec3-y b))
+               (/ 1.0 (vec3-z b)))
+         b))