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-rw-r--r--shared_cpp/mathlib.cpp236
-rw-r--r--shared_cpp/mathlib.h59
-rw-r--r--shared_cpp/types.h2
3 files changed, 281 insertions, 16 deletions
diff --git a/shared_cpp/mathlib.cpp b/shared_cpp/mathlib.cpp
index 4dd3dd0..b7748fe 100644
--- a/shared_cpp/mathlib.cpp
+++ b/shared_cpp/mathlib.cpp
@@ -1,3 +1,12 @@
+// mathlib.cpp
+//
+// Created by Matt Kosarek
+//
+// A file containing some common math functionality that I find
+// useful in my projects. I don't like that I don't know what's happening
+// in glm, so I wrote most of this myself. All mistakes are my own.
+//
+
#include "mathlib.h"
#include <cstdlib>
@@ -71,17 +80,147 @@ void Vector2::printDebug(const char* name) {
// ***************************************
// Vector3
+Vector3::Vector3() { };
+
+Vector3::Vector3(float value) {
+ x = value;
+ y = value;
+ z = value;
+}
+
+Vector3::Vector3(float inX, float inY, float inZ) {
+ x = inX;
+ y = inY;
+ z = inZ;
+}
+
float Vector3::length() {
return sqrtf(x * x + y * y + z * z);
}
-Vector3 Vector3::operator+(const Vector3& other) {
- return { x + other.x, y + other.y, z + other.z };
+float Vector3::dot(const Vector3& other) {
+ return x * other.x + y * other.y + z * other.z;
+}
+
+Vector3 Vector3::scale(float scalar) {
+ return {
+ x * scalar,
+ y * scalar,
+ z * scalar
+ };
+}
+
+Vector3 Vector3::add(const Vector3& other) {
+ return {
+ x + other.x,
+ y + other.y,
+ z + other.z
+ };
+}
+
+Vector3 Vector3::subtract(const Vector3& other) {
+ return {
+ x - other.x,
+ y - other.y,
+ z - other.z
+ };
+}
+
+Vector3 Vector3::negate() {
+ return {
+ -x,
+ -y,
+ -z
+ };
+}
+
+Vector3 Vector3::cross(const Vector3& other) {
+ return {
+ y * other.z - z * other.y,
+ z * other.x - x * other.z,
+ x * other.y - y * other.x
+ };
+}
+
+Vector3 Vector3::normalize() {
+ float len = 1.f / length();
+ return {
+ x * len,
+ y * len,
+ z * len
+ };
+}
+
+Vector3 Vector3::operator+(const Vector3& v2) {
+ return add(v2);
+}
+
+Vector3 Vector3::operator-(const Vector3& v2) {
+ return subtract(v2);
+}
+
+Vector3 Vector3::operator-() {
+ return negate();
+}
+
+Vector3 Vector3::operator*(float value) {
+ return scale(value);
+}
+
+Vector3 Vector3::operator*(const Vector3& v2) {
+ return {
+ x * v2.x,
+ y * v2.y,
+ z * v2.z
+ };
+}
+
+float Vector3::operator [](int index) {
+ switch (index) {
+ case 0:
+ return x;
+ case 1:
+ return y;
+ case 2:
+ return z;
+ default:
+ return 0;
+ }
+}
+
+
+void Vector3::printDebug(const char* name) {
+ printf("%s=Vector3(%f, %f, %f)\n", name, x, y, z);
}
// ***************************************
// Vector4
+Vector4::Vector4() { }
+
+Vector4::Vector4(float value) {
+ x = value;
+ y = value;
+ z = value;
+ w = value;
+}
+
+Vector4::Vector4(float inX, float inY, float inZ, float inW) {
+ x = inX;
+ y = inY;
+ z = inZ;
+ w = inW;
+}
+
+Vector4 Vector4::fromColor(float r, float g, float b, float a) {
+ float scale = 1.f / 255.f;
+ return { r * scale, g * scale, b * scale, a * scale };
+}
+
+Vector4 Vector4::toNormalizedColor() {
+ return fromColor(x, y, z, w);
+}
+
float Vector4::length() {
return sqrtf(x * x + y * y + z * z + w * w);
}
@@ -93,13 +232,92 @@ Vector4 Vector4::normalize() {
return { x * inverseLength, y * inverseLength, z * inverseLength, w * inverseLength };
}
-Vector4 Vector4::fromColor(float r, float g, float b, float a) {
- float scale = 1.f / 255.f;
- return { r * scale, g * scale, b * scale, a * scale };
+float Vector4::dot(const Vector4& other) {
+ return x * other.x + y * other.y + z * other.z + w * other.w;
}
-Vector4 Vector4::toNormalizedColor() {
- return fromColor(x, y, z, w);
+Vector4 Vector4::scale(float scalar) {
+ return {
+ x * scalar,
+ y * scalar,
+ z * scalar,
+ w * scalar
+ };
+}
+
+Vector4 Vector4::add(const Vector4& other) {
+ return {
+ x + other.x,
+ y + other.y,
+ z + other.z,
+ w + other.w
+ };
+}
+
+Vector4 Vector4::subtract(const Vector4& other) {
+ return {
+ x - other.x,
+ y - other.y,
+ z - other.z,
+ w - other.w
+ };
+}
+
+Vector4 Vector4::negate() {
+ return { -x, -y, -z, -w };
+}
+
+Vector4 Vector4::cross(const Vector4& other) {
+ return {
+ y * other.z - z * other.y,
+ z * other.x - x * other.z,
+ x * other.y - y * other.x,
+ 1.f
+ };
+}
+
+Vector4 Vector4::operator+(const Vector4& v2) {
+ return add(v2);
+}
+
+Vector4 Vector4::operator-(const Vector4& v2) {
+ return subtract(v2);
+}
+
+Vector4 Vector4::operator-() {
+ return negate();
+}
+
+Vector4 Vector4::operator*(float value) {
+ return scale(value);
+}
+
+Vector4 Vector4::operator*(const Vector4& v2) {
+ return {
+ x * v2.x,
+ y * v2.y,
+ z * v2.z,
+ w * v2.w
+ };
+}
+
+float Vector4::operator[](int index) {
+ switch (index) {
+ case 0:
+ return x;
+ case 1:
+ return y;
+ case 2:
+ return z;
+ case 3:
+ return w;
+ default:
+ return 0;
+ }
+}
+
+void Vector4::printDebug(const char* name) {
+ printf("%s=Vector4(%f, %f, %f, %f)\n", name, x, y, z, w);
}
@@ -402,6 +620,6 @@ Mat4x4 Quaternion::toMatrix() const {
};
}
-float Quaternion::dot(const Quaternion& second) const {
- return w * second.w + x * second.x + y * second.y + z * second.z;
+float Quaternion::dot(const Quaternion& other) const {
+ return w * other.w + x * other.x + y * other.y + z * other.z;
}
diff --git a/shared_cpp/mathlib.h b/shared_cpp/mathlib.h
index cff9ece..d550e90 100644
--- a/shared_cpp/mathlib.h
+++ b/shared_cpp/mathlib.h
@@ -1,3 +1,12 @@
+// mathlib.h
+//
+// Created by Matt Kosarek
+//
+// A file containing some common math functionality that I find
+// useful in my projects. I don't like that I don't know what's happening
+// in glm, so I wrote most of this myself. All mistakes are my own.
+//
+
#pragma once
#include <cstdio>
#include <cstdlib>
@@ -8,6 +17,7 @@
#define MIN(x, y) (((x) < (y)) ? (x) : (y))
#define ABS(x) (x < 0 ? -x : x)
#define SIGN(x) (x < 0 ? -1 : 1)
+#define PI 3.141592653589793238463
struct Vector2 {
float x = 0;
@@ -24,8 +34,9 @@ struct Vector2 {
Vector2 negate();
Vector2 getPerp();
Vector2 rotate(float angle);
- void printDebug(const char* name);
float determinant(Vector2 other);
+
+ void printDebug(const char* name);
};
struct Vector3 {
@@ -33,20 +44,58 @@ struct Vector3 {
float y = 0.f;
float z = 0.f;
+ Vector3();
+ Vector3(float value);
+ Vector3(float x, float y, float z);
+
float length();
- Vector3 operator+(const Vector3& other);
+ float dot(const Vector3& other);
+ Vector3 scale(float scalar);
+ Vector3 add(const Vector3& other);
+ Vector3 subtract(const Vector3& other);
+ Vector3 negate();
+ Vector3 cross(const Vector3& other);
+ Vector3 normalize();
+
+ Vector3 operator+(const Vector3& v2);
+ Vector3 operator-(const Vector3& v2);
+ Vector3 operator-();
+ Vector3 operator*(float value);
+ Vector3 operator*(const Vector3& v2);
+ float operator[](int index);
+
+ void printDebug(const char* name);
};
struct Vector4 {
float x = 0.f;
float y = 0.f;
float z = 0.f;
- float w = 0.f;
+ float w = 1.f;
- float length();
- Vector4 normalize();
+ Vector4();
+ Vector4(float value);
+ Vector4(float inX = 0.f, float inY = 0.f, float inZ = 0.f, float inW = 1.f);
Vector4 fromColor(float r, float g, float b, float a);
Vector4 toNormalizedColor();
+
+ float length();
+ Vector4 normalize();
+ float dot(const Vector4& other);
+ Vector4 scale(float scalar);
+ Vector4 add(const Vector4& other);
+ Vector4 subtract(const Vector4& other);
+ Vector4 negate();
+ Vector4 cross(const Vector4& other);
+
+ Vector4 operator+(const Vector4& v2);
+ Vector4 operator-(const Vector4& v2);
+ Vector4 operator-();
+ Vector4 operator*(float value);
+ Vector4 operator*(const Vector4& v2);
+ float operator[](int index);
+
+ void printDebug(const char* name);
};
struct Mat4x4 {
diff --git a/shared_cpp/types.h b/shared_cpp/types.h
index 3739699..7bac7f3 100644
--- a/shared_cpp/types.h
+++ b/shared_cpp/types.h
@@ -14,5 +14,3 @@ typedef unsigned long uint64;
typedef float float32;
typedef double float64;
-
-#define PI 3.14159265358979323846 \ No newline at end of file
generated by cgit v1.2.1 (git 2.18.0) at 2024-11-22 04:20:34 +0000