From 48701d9931ca4b137601315c3551d395d9e3d6d9 Mon Sep 17 00:00:00 2001
From: Gregory Wells <me@gregorywells.dev>
Date: Tue, 24 Jun 2025 17:07:41 -0400
Subject: [PATCH] i done messed up

---
 utils/math/gryphn_mat4.h | 33 +++++++++++++++++++++++++++++++++
 utils/math/gryphn_vec3.h |  3 ++-
 2 files changed, 35 insertions(+), 1 deletion(-)

diff --git a/utils/math/gryphn_mat4.h b/utils/math/gryphn_mat4.h
index 687730f..d49346d 100644
--- a/utils/math/gryphn_mat4.h
+++ b/utils/math/gryphn_mat4.h
@@ -79,6 +79,18 @@ static inline const gnMat4x4 gnRotate(gnVec3 axis, float rotation) {
 	return rotate;
 }
 
+static inline const gnMat4x4 gnScale(gnVec3 amount) {
+	gnMat4 rotate = {
+	.mat = {
+            { amount.x, 0.0f, 0.0f, 0.0f },
+            { 0.0f, amount.y, 0.0f, 0.0f },
+            { 0.0f, 0.0f, amount.z, 0.0f },
+            { 0.0f, 0.0f, 0.0f, 1.0f }
+        }
+	};
+	return rotate;
+}
+
 // used GLMs lookAtLH from /glm/ext/matrix_transform.inl as a base
 static inline const gnMat4x4 gnLookAt(gnVec3 eye, gnVec3 center, gnVec3 up) {
     const gnVec3 f = gnVec3Normalize(gnVec3Subtract(center, eye));
@@ -94,3 +106,24 @@ static inline const gnMat4x4 gnLookAt(gnVec3 eye, gnVec3 center, gnVec3 up) {
         }
     };
 }
+
+static inline const gnMat4x4 gnMultiply(gnMat4 a, gnMat4 b) {
+    gnMat4 result;
+
+    for (int row = 0; row < 4; ++row)
+        for (int col = 0; col < 4; ++col)
+            result.mat[row][col] =  a.mat[row][0] * b.mat[0][col] +
+                                    a.mat[row][1] * b.mat[1][col] +
+                                    a.mat[row][2] * b.mat[2][col] +
+                                    a.mat[row][3] * b.mat[3][col];
+
+    return result;
+}
+
+static inline const gnVec3 gnMat4MultiplyVec3(gnMat4 m, gnVec3 v) {
+    gnVec3 result;
+    result.x = m.mat[0][0] * v.x + m.mat[1][0] * v.y + m.mat[2][0] * v.z + m.mat[3][0];
+    result.y = m.mat[0][1] * v.x + m.mat[1][1] * v.y + m.mat[2][1] * v.z + m.mat[3][1];
+    result.z = m.mat[0][2] * v.x + m.mat[1][2] * v.y + m.mat[2][2] * v.z + m.mat[3][2];
+    return result;
+}
diff --git a/utils/math/gryphn_vec3.h b/utils/math/gryphn_vec3.h
index 1f7a25f..8af2d71 100644
--- a/utils/math/gryphn_vec3.h
+++ b/utils/math/gryphn_vec3.h
@@ -35,7 +35,8 @@ static const inline gnVec3 gnVec3Normalize(gnVec3 in) {
 }
 static const inline gnVec3 gnVec3Cross(gnVec3 a, gnVec3 b) { return (gnVec3){a.y * b.z - a.z * b.y, a.z * b.x - a.x * b.z, a.x * b.y - a.y * b.x}; }
 static const inline float gnVec3Dot(gnVec3 a, gnVec3 b) { return a.x * b.x + a.y * b.y + a.z * b.z; }
-
+static const inline gnVec3 gnVec3Multiply(gnVec3 a, gnVec3 b) { return (gnVec3){ a.x * b.x, a.y * b.y, a.z * b.z }; }
+static const inline gnVec3 gnVec3MultiplyBy(gnVec3 a, float b) { return (gnVec3){ a.x * b, a.y * b, a.z * b }; }
 
 typedef gnVec3 gnFVec3;
 typedef gnVec3 gnFloat3;