1 files changed, 29 insertions, 0 deletions
diff --git a/src/camera2d.cpp b/src/camera2d.cpp
new file mode 100644
index 00000000..5dd25bb3
--- /dev/null
+++ b/src/camera2d.cpp
@@ -0,0 +1,29 @@
+#include "camera2d.hpp"
+
+namespace yage
+{
+
+Camera2D::Camera2D(int screen_width, int screen_height) :
+    position_(0.f, 0.f),
+    camera_matrix_(1.f),
+    ortho_matrix_(glm::ortho(0.f, (float)screen_width, 0.f, (float)screen_height))
+{}
+
+Camera2D::~Camera2D()
+{}
+
+void Camera2D::update()
+{
+    if(matrix_needs_update_)
+    {
+	glm::vec3 translate(-position_.x, -position_.y, 0.f);
+	glm::vec3 scale(scale_, scale_, 0.f);
+	    
+	camera_matrix_=glm::translate(ortho_matrix_, translate);
+	camera_matrix_=glm::scale(glm::mat4(1.f), scale)*camera_matrix_;
+
+	matrix_needs_update_=false;
+    }
+}
+
+} // yage