Method RescaleUI

src/Renderer/RaceNetRenderer.cpp:88–119

}

void RaceNetRenderer::RescaleUI(){
    if(ImGui::IsAnyItemActive()) return;

    // Get mouse movement and compute new projection matrix with it
    static float prevZoomLevel = ImGui::GetIO().MouseWheel * 4.0f;
    float currentZoomLevel     = ImGui::GetIO().MouseWheel * 4.0f;

    // If panning, update projection matrix
    if (ImGui::GetIO().MouseDown[0]) {
        float xChange = ImGui::GetIO().MouseDelta.x;
        float yChange = ImGui::GetIO().MouseDelta.y;

        minX -= xChange*0.5f;
        maxX -= xChange*0.5f;
        minY -= yChange*0.5f;
        maxY -= yChange*0.5f;

        projectionMatrix = glm::ortho(minX, maxX, minY, maxY, -1.0f, 1.0f);
    }

    // If scrolling, update projection matrix
    if(prevZoomLevel != currentZoomLevel){
        prevZoomLevel = currentZoomLevel;

        minX += currentZoomLevel;
        maxX -= currentZoomLevel;
        minY -= (currentZoomLevel * 0.5625f);
        maxY += (currentZoomLevel * 0.5625f);

        projectionMatrix = glm::ortho(minX, maxX, minY, maxY, -1.0f, 1.0f);
    }
}

RaceNetRenderer::~RaceNetRenderer() {
    ImGui_ImplOpenGL3_Shutdown();