basic camera movement

include/render/Renderer.h

@@ -31,6 +31,8 @@ private:
 	std::unique_ptr<shader::WorldShader> m_WorldShader;
 	std::unique_ptr<shader::EntityShader> m_EntityShader;
 
+	Vec2i m_WindowSize;
+
 	Vec3f m_BackgroundColor;
 
 	Camera m_Camera {};

src/render/Renderer.cpp

@@ -82,6 +82,7 @@ void Renderer::Resize(int width, int height) {
 	m_WorldShader->SetProjectionMatrix(m_Camera.projectionMatrix);
 	m_EntityShader->Start();
 	m_WorldShader->SetProjectionMatrix(m_Camera.projectionMatrix);
+	m_WindowSize = {width, height};
 	glViewport(0, 0, width, height);
 }
 
@@ -90,14 +91,14 @@ void Renderer::SetZoom(float zoom) {
 }
 
 void Renderer::SetCamMovement(const Vec2f& mov) {
-	m_Camera.CamPos.x -= mov.x / m_Camera.CamPos.y * 5000.0f;
+	Vec2f cursor = {static_cast<float>(m_WindowSize.x) / 2.0f - mov.x, static_cast<float>(m_WindowSize.y) / 2.0f - mov.y};
-	m_Camera.CamPos.z -= mov.y / m_Camera.CamPos.y * 5000.0f;
+	Vec2f worldMovement = GetCursorWorldPos(cursor, m_WindowSize.x, m_WindowSize.y);
-	SetCamPos(m_Camera.CamPos);
+	SetCamPos({worldMovement.x, m_Camera.CamPos.y, worldMovement.y});
 }
 
 void Renderer::SetCamPos(const Vec3f& newPos) {
 	m_Camera.CamPos = newPos;
-	m_Camera.viewMatrix = maths::Look(m_Camera.CamPos, {0, -1, -0.0001}, {0, 1, 0});
+	m_Camera.viewMatrix = maths::Look(m_Camera.CamPos, {0, -1, -0.000000001}, {0, 1, 0});
 	m_Camera.InvViewMatrix = maths::Inverse(m_Camera.viewMatrix);
 	m_WorldShader->Start();
 	m_WorldShader->SetViewMatrix(m_Camera.viewMatrix);

src/render/WorldRenderer.cpp

@@ -53,7 +53,7 @@ void WorldRenderer::Update() {
 		ImVec2 mouseDelta = ImGui::GetIO().MouseDelta;
 		const float relativeX = mouseDelta.x / (float)Display::GetWindowWidth() * 2;
 		const float relativeY = mouseDelta.y / (float)Display::GetWindowHeight() * 2;
-		MoveCam(relativeX, relativeY);
+		MoveCam(mouseDelta.x, mouseDelta.y);
 	}
 	if (io.MouseWheel != 0) {
 		ChangeZoom(io.MouseWheel);