bool CameraTool2D::doStartMouseDrag(const InputState& inputState) {
if (pan(inputState)) {
m_lastMousePos = Vec2f(static_cast<float>(inputState.mouseX()),
static_cast<float>(inputState.mouseY()));
return true;
}
return false;
}
bool CameraTool2D::doMouseDrag(const InputState& inputState) {
if (pan(inputState)) {
const Vec2f currentMousePos(static_cast<float>(inputState.mouseX()), static_cast<float>(inputState.mouseY()));
const Vec3f lastWorldPos = m_camera.unproject(m_lastMousePos.x(), m_lastMousePos.y(), 0.0f);
const Vec3f currentWorldPos = m_camera.unproject(currentMousePos.x(), currentMousePos.y(), 0.0f);
const Vec3f delta = currentWorldPos - lastWorldPos;
m_camera.moveBy(-delta);
m_lastMousePos = currentMousePos;
return true;
}
return false;
}
void CameraTool2D::doMouseScroll(const InputState& inputState) {
if (zoom(inputState)) {
const float speed = pref(Preferences::CameraMouseWheelInvert) ? -1.0f : 1.0f;
if (inputState.scrollY() != 0.0f) {
const Vec2f mousePos(static_cast<float>(inputState.mouseX()), static_cast<float>(inputState.mouseY()));
const Vec3f oldWorldPos = m_camera.unproject(mousePos.x(), mousePos.y(), 0.0f);
const float factor = 1.0f + inputState.scrollY() / 50.0f * speed;
m_camera.zoom(factor);
const Vec3f newWorldPos = m_camera.unproject(mousePos.x(), mousePos.y(), 0.0f);
const Vec3f delta = newWorldPos - oldWorldPos;
m_camera.moveBy(-delta);
}
}
}
