Method cursorHandler

src/backend/opengl/glfw/window.cpp:286–338

}

void Widget::cursorHandler(const float pXPos, const float pYPos)
{
    static const float SPEED = 0.005f;

    float deltaX = mLastXPos - pXPos;
    float deltaY = mLastYPos - pYPos;

    const glm::mat4 viewMat = getCellViewMatrix(pXPos, pYPos);

    if (mButton == GLFW_MOUSE_BUTTON_LEFT) {
        // Translate
        glm::mat4 vMat = translate(viewMat, glm::vec3(-deltaX, deltaY, 0.0f) * SPEED);

        setCellViewMatrix(pXPos, pYPos, vMat);

    } else if (mButton == GLFW_MOUSE_BUTTON_LEFT + 10 * GLFW_MOD_ALT ||
               mButton == GLFW_MOUSE_BUTTON_LEFT + 10 * GLFW_MOD_CONTROL) {
        // Zoom
        if(deltaY != 0.0f) {
            if(deltaY < 0.0f) {
                deltaY = 1.0f / (-deltaY);
            }
            glm::mat4 vMat = scale(viewMat, glm::vec3(pow(deltaY, SPEED)));

            setCellViewMatrix(pXPos, pYPos, vMat);
        }
    } else if (mButton == GLFW_MOUSE_BUTTON_RIGHT) {
        const glm::mat4 orientationMat = getCellOrientationMatrix(pXPos, pYPos);

        // Rotation
        int width, height;
        glfwGetWindowSize(mWindow, &width, &height);

        if (mLastXPos != pXPos || mLastYPos != pYPos) {
            glm::vec3 op1 = trackballPoint(mLastXPos, mLastYPos, float(width), float(height));
            glm::vec3 op2 = trackballPoint(pXPos, pYPos, float(width), float(height));

            float angle = std::acos(std::min(1.0f, glm::dot(op1, op2)));

            glm::vec3 axisInCamCoord = glm::cross(op1, op2);

            glm::mat3 camera2object = glm::inverse(glm::mat3(viewMat));
            glm::vec3 axisInObjCoord = camera2object * axisInCamCoord;

            glm::mat4 oMat = glm::rotate(orientationMat, glm::degrees(angle), axisInObjCoord);

            setCellOrientationMatrix(pXPos, pYPos, oMat);
        }
    }

    mLastXPos = pXPos;
    mLastYPos = pYPos;
}

void Widget::mouseButtonHandler(int pButton, int pAction, int pMods)
{