chore: initial commit

src/gx/CCamera.cpp

@@ -0,0 +1,58 @@
+#include "gx/CCamera.hpp"
+#include "gx/Shader.hpp"
+#include "gx/Transform.hpp"
+#include <cmath>
+#include <tempest/Math.hpp>
+#include <tempest/Matrix.hpp>
+#include <tempest/Rect.hpp>
+
+const C3Vector CCamera::DEFAULT_POSITION = { 100.0f, 0.0f, 0.0f };
+const float CCamera::DEFAULT_DIST = 100.0f;
+const float CCamera::DEFAULT_FARZ = 5000.0f;
+const float CCamera::DEFAULT_NEARZ = 8.0f;
+
+float CAngle::ClampTo2Pi(float angle) {
+    double v1 = floor(static_cast<double>(CMath::OO_TWO_PI) * angle) * CMath::TWO_PI;
+
+    if (angle < 0.0f) {
+        v1 -= CMath::TWO_PI;
+    }
+
+    return angle - v1;
+}
+
+void CAngle::Set(const float& angle) {
+    float clampedAngle = CAngle::ClampTo2Pi(angle);
+
+    if (this->m_data != clampedAngle) {
+        this->m_flags |= CBaseManaged::UPDATED;
+        this->m_data = clampedAngle;
+    }
+
+    this->m_cos = cos(this->m_data);
+    this->m_sin = sin(this->m_data);
+}
+
+void CCamera::SetupWorldProjection(const CRect& projectionRect, uint32_t flags) {
+    C44Matrix projMat;
+    float aspect = (projectionRect.maxX - projectionRect.minX) / (projectionRect.maxY - projectionRect.minY);
+    GxuXformCreateProjection_SG(this->m_fov.m_data, aspect, this->m_zNear.m_data, this->m_zFar.m_data, projMat);
+    GxXformSetProjection(projMat);
+
+    C44Matrix viewMat;
+    C3Vector cameraPos = { 0.0f, 0.0f, 0.0f };
+    C3Vector cameraVec = {
+        this->m_target.m_data.x - this->m_position.m_data.x,
+        this->m_target.m_data.y - this->m_position.m_data.y,
+        this->m_target.m_data.z - this->m_position.m_data.z
+    };
+    C3Vector upVec = {
+        this->m_rotation.m_sin * this->m_roll.m_sin,
+        -(this->m_rotation.m_cos * this->m_roll.m_sin),
+        this->m_roll.m_cos
+    };
+    GxuXformCreateLookAtSgCompat(cameraPos, cameraVec, upVec, viewMat);
+    GxXformSetView(viewMat);
+
+    CShaderEffect::UpdateProjMatrix();
+}