1 files changed, 46 insertions, 0 deletions
diff --git a/source/30-game/Camera.cpp b/source/30-game/Camera.cpp
new file mode 100644
index 0000000..39f0369
--- /dev/null
+++ b/source/30-game/Camera.cpp
@@ -0,0 +1,46 @@
+#include "Camera.hpp"
+
+#include "AppConfig.hpp"
+
+#include <glm/gtc/matrix_transform.hpp>
+
+Camera::Camera()
+	: eye(0.0f, 0.0f, 0.0f)
+	, target(0.0, 0.0f, -2.0f)
+	, pixelsPerMeter{ 50.0f } // Basic default
+	, fov{ M_PI / 4 } // 45deg is the convention
+	, perspective{ false } //
+{
+}
+
+void Camera::SetEyePos(glm::vec3 pos) {
+	auto lookVector = this->target - /*Old pos*/ this->eye;
+	this->eye = pos;
+	this->target = pos + lookVector;
+}
+
+void Camera::SetTargetPos(glm::vec3 pos) {
+	this->target = pos;
+}
+
+void Camera::SetTargetDirection(glm::vec3 lookVector) {
+	this->target = this->eye + lookVector;
+}
+
+void Camera::SetHasPerspective(bool perspective) {
+	this->perspective = perspective;
+}
+
+glm::mat4 Camera::CalcViewMatrix() const {
+	return glm::lookAt(eye, target, glm::vec3(0, 1, 0));
+}
+
+glm::mat4 Camera::CalcProjectionMatrix() const {
+	if (perspective) {
+		return glm::perspective(fov, AppConfig::mainWindowAspectRatio, 0.1f, 1000.0f);
+	} else {
+		float widthMeters = AppConfig::mainWindowWidth / pixelsPerMeter;
+		float heightMeters = AppConfig::mainWindowHeight / pixelsPerMeter;
+		return glm::ortho(-widthMeters / 2, +widthMeters / 2, -heightMeters / 2, +heightMeters / 2);
+	}
+}