From 0b3d69976819219e71350b6a988d1704fd5f0746 Mon Sep 17 00:00:00 2001
From: talha <talha@talhaamir.xyz>
Date: Thu, 27 Nov 2025 13:18:57 +0500
Subject: Added files to git.

Current State:
- hot reloading
- math library (calcify)
- triangle rendering (unbatched)
- orthographic projection (no camera)
- layer isolation setup (platform vs game)
---
 source/calcify.h | 146 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 146 insertions(+)
 create mode 100644 source/calcify.h

(limited to 'source/calcify.h')

diff --git a/source/calcify.h b/source/calcify.h
new file mode 100644
index 0000000..d0c3499
--- /dev/null
+++ b/source/calcify.h
@@ -0,0 +1,146 @@
+#pragma once
+
+#include <math.h>
+#include <string.h>
+
+#if !AMR_MATH_USE_TYPES
+#include <stdint.h>
+
+typedef int32_t i32;
+typedef int64_t i64;
+
+typedef float   r32;
+typedef double  r64;
+
+typedef int8_t  b8;
+#endif
+
+#define PI 3.14159265358979323846264338327950288f
+#define SQUARE(x) ((x)*(x))
+#define TO_RAD(x) ((x)*PI/180.0f)
+#define TO_DEG(x) ((x)*180.0f/PI)
+#define ABS(x) ((x) > 0 ? (x) : -(x))
+#define MIN(x, y) ((x) < (y) ? (y) : (x))
+#define MAX(x, y) ((x) > (y) ? (y) : (x))
+
+union Vec3 {
+    struct {
+        r32 x;
+        r32 y;
+        r32 z;
+    };
+    struct {
+        r32 r;
+        r32 g;
+        r32 b;
+    };
+    r32 buffer[3];
+};
+
+union Vec4 {
+    struct {
+        r32 x;
+        r32 y;
+        r32 z;
+        r32 w;
+    };
+    r32 buffer[4];
+};
+
+union Mat4 {
+    Vec4 row[4];
+    r32 array[4][4];
+    r32 buffer[16];
+};
+
+Mat4 calcify_init4m(void);
+Mat4 calcify_ident4m(void);
+Mat4 calcify_multiply4mv(Mat4 a, Mat4 b);
+Mat4 calcify_multiply4m(Mat4 a, Mat4 b);
+Mat4 calcify_translation_matrix4m(r32 x, r32 y, r32 z);
+Mat4 calcify_ortho4m(r32 left, r32 right, r32 top, r32 bot, r32 near, r32 far);
+
+Mat4 calcify_init4m(void) {
+    Mat4 res;
+    memset(&res, 0, sizeof(Mat4));
+    return res;
+}
+
+Mat4 calcify_ident4m(void) {
+    Mat4 res = calcify_init4m();
+    res.array[0][0] = 1.0f;
+    res.array[1][1] = 1.0f;
+    res.array[2][2] = 1.0f;
+    res.array[3][3] = 1.0f;
+
+    return res;
+}
+
+Vec4 calcify_multiply4mv(Mat4 m, Vec4 v) {
+    Vec4 res = {0};
+    res.x = 0;
+    res.y = 0;
+    res.z = 0;
+    res.w = 0;
+
+    res.x = v.x*m.array[0][0];
+    res.y = v.x*m.array[0][1];
+    res.z = v.x*m.array[0][2];
+    res.w = v.x*m.array[0][3];
+
+    res.x += v.y*m.array[1][0];
+    res.y += v.y*m.array[1][1];
+    res.z += v.y*m.array[1][2];
+    res.w += v.y*m.array[1][3];
+
+    res.x += v.z*m.array[2][0];
+    res.y += v.z*m.array[2][1];
+    res.z += v.z*m.array[2][2];
+    res.w += v.z*m.array[2][3];
+
+    res.x += v.w*m.array[3][0];
+    res.y += v.w*m.array[3][1];
+    res.z += v.w*m.array[3][2];
+    res.w += v.w*m.array[3][3];
+
+    return res;
+};
+
+Mat4 calcify_multiply4m(Mat4 a, Mat4 b) {
+    Mat4 res = calcify_init4m();
+
+    res.row[0] = calcify_multiply4mv(a, b.row[0]);
+    res.row[1] = calcify_multiply4mv(a, b.row[1]);
+    res.row[2] = calcify_multiply4mv(a, b.row[2]);
+    res.row[3] = calcify_multiply4mv(a, b.row[3]);
+
+    return res;
+}
+
+Mat4 calcify_translation_matrix4m(r32 x, r32 y, r32 z) {
+    Mat4 trans = calcify_ident4m();
+    trans.row[3] = Vec4{x, y, z, 1.0f};
+    return trans;
+};
+
+Mat4 calcify_scaling_matrix4m(r32 x, r32 y) {
+    Mat4 scale = calcify_ident4m();
+    scale.array[0][0] = x;
+    scale.array[1][1] = y;
+    scale.array[2][2] = 0;
+
+    return scale;
+}
+
+Mat4 calcify_ortho4m(r32 left, r32 right, r32 bottom, r32 top, r32 near, r32 far) {
+    Mat4 res = calcify_init4m();
+    res.array[0][0] = 2.0f/(right - left);
+    res.array[1][1] = 2.0f/(top - bottom);
+    res.array[2][2] = 2.0f/(near - far);
+    res.array[3][0] = (right + left)/(left - right);
+    res.array[3][1] = (top + bottom)/(bottom - top);
+    res.array[3][2] = (far + near)/(near - far);
+    res.array[3][3] = 1.0f;
+
+    return(res);
+}
-- 
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