refactored camera

2026-06-09 16:54:35 +00:00 · 2024-12-04 04:58:29 +03:00
parent c2c0b29dc9
commit dc3fcafd48
16 changed files with 262 additions and 194 deletions
@@ -0,0 +1,98 @@
+//
+// Created by Orange on 12/4/2024.
+//
+#pragma once
+#include "Constants.h"
+
+
+namespace omath::source
+{
+    [[nodiscard]]
+    inline Vector3 ForwardVector(const ViewAngles& angles)
+    {
+        const auto cosPitch = angles.pitch.Cos();
+        const auto sinPitch = angles.pitch.Sin();
+
+        const auto cosYaw = angles.yaw.Cos();
+        const auto sinYaw = angles.yaw.Sin();
+
+
+        return {cosPitch * cosYaw, cosPitch * sinYaw, -sinPitch};
+    }
+
+    [[nodiscard]]
+    inline Vector3 RightVector(const ViewAngles& angles)
+    {
+        const auto cosPitch = angles.pitch.Cos();
+        const auto sinPitch = angles.pitch.Sin();
+
+        const auto cosYaw = angles.yaw.Cos();
+        const auto sinYaw = angles.yaw.Sin();
+
+        const auto cosRoll = angles.roll.Cos();
+        const auto sinRoll = angles.roll.Sin();
+
+
+        return
+        {
+            -1 * sinRoll * sinPitch * cosYaw + -1 * cosRoll * -sinYaw,
+            -1 * sinRoll * sinPitch * sinYaw + -1 * cosRoll * cosYaw,
+            -1 * sinRoll * cosPitch
+        };
+    }
+
+    [[nodiscard]]
+    inline Vector3 UpVector(const ViewAngles& angles)
+    {
+        const auto cosPitch = angles.pitch.Cos();
+        const auto sinPitch = angles.pitch.Sin();
+
+        const auto cosYaw = angles.yaw.Cos();
+        const auto sinYaw = angles.yaw.Sin();
+
+        const auto cosRoll = angles.roll.Cos();
+        const auto sinRoll = angles.roll.Sin();
+
+
+        return
+        {
+            cosRoll * sinPitch * cosYaw + - sinRoll * -sinYaw,
+            cosRoll * sinPitch * sinYaw + - sinRoll * cosYaw,
+            cosRoll * cosPitch,
+        };
+    }
+
+    [[nodiscard]]
+    constexpr Mat4x4 ViewMatrixFromVecs(const Vector3& forward, const Vector3& right, const Vector3& up,
+                                        const Vector3& camera_pos)
+    {
+        return Mat4x4{
+                           {right.x, right.y, right.z, 0},
+                           {up.x, up.y, up.z, 0},
+                           {forward.x, forward.y, forward.z, 0},
+                           {0, 0, 0, 1},
+                   } *
+                   MatTranslation<float, MatStoreType::ROW_MAJOR>(-camera_pos);
+    }
+
+    [[nodiscard]] inline Mat4x4 ViewMatrix(const ViewAngles& angles, const Vector3& cam_origin)
+    {
+        return ViewMatrixFromVecs(ForwardVector(angles), RightVector(angles), UpVector(angles), cam_origin);
+    }
+
+
+    [[nodiscard]]
+    inline Mat4x4 PerspectiveProjectionMatrix(const float fieldOfView, const float aspectRatio, const float near, const float far)
+    {
+        constexpr auto kMultiplyFactor = 0.75f;
+
+        const float fovHalfTan = std::tan(angles::DegreesToRadians(fieldOfView) / 2.f) * kMultiplyFactor;
+
+        return {
+                        {-1.f / (aspectRatio * fovHalfTan), 0, 0, 0},
+                        {0, -1.f / (fovHalfTan), 0, 0},
+                        {0, 0, (far + near) / (far - near), -(2.f * far * near) / (far - near)},
+                        {0, 0, 1, 0},
+                };
+    }
+} // namespace omath::source