C++ MyAvatar::getLaserPointerTipPosition方法代码示例

//Caculate the click location using one of the sixense controllers. Scale is not applied
QPoint ApplicationCompositor::getPalmClickLocation(const PalmData *palm) const {
    QPoint rv;
    auto canvasSize = qApp->getCanvasSize();
    if (qApp->isHMDMode()) {
        glm::vec2 polar = getPolarCoordinates(*palm);
        glm::vec2 point = sphericalToScreen(-polar);
        rv.rx() = point.x;
        rv.ry() = point.y;
    } else {
        MyAvatar* myAvatar = DependencyManager::get<AvatarManager>()->getMyAvatar();
        glm::dmat4 projection;
        qApp->getProjectionMatrix(&projection);
        glm::quat invOrientation = glm::inverse(myAvatar->getOrientation());
        glm::vec3 eyePos = myAvatar->getDefaultEyePosition();
        glm::vec3 tip = myAvatar->getLaserPointerTipPosition(palm);
        glm::vec3 tipPos = invOrientation * (tip - eyePos);

        glm::vec4 clipSpacePos = glm::vec4(projection * glm::dvec4(tipPos, 1.0));
        glm::vec3 ndcSpacePos;
        if (clipSpacePos.w != 0) {
            ndcSpacePos = glm::vec3(clipSpacePos) / clipSpacePos.w;
        }

        rv.setX(((ndcSpacePos.x + 1.0) / 2.0) * canvasSize.x);
        rv.setY((1.0 - ((ndcSpacePos.y + 1.0) / 2.0)) * canvasSize.y);
    }
    return rv;
}

void ApplicationOverlay::renderPointersOculus(const glm::vec3& eyePos) {
    glBindTexture(GL_TEXTURE_2D, _crosshairTexture);
    glDisable(GL_DEPTH_TEST);
    glMatrixMode(GL_MODELVIEW);
    
    //Controller Pointers
    MyAvatar* myAvatar = Application::getInstance()->getAvatar();
    for (int i = 0; i < (int)myAvatar->getHand()->getNumPalms(); i++) {

        PalmData& palm = myAvatar->getHand()->getPalms()[i];
        if (palm.isActive()) {
            glm::vec3 tip = myAvatar->getLaserPointerTipPosition(&palm);
            glm::vec3 tipDirection = glm::normalize(glm::inverse(myAvatar->getOrientation()) * (tip - eyePos));
            float pitch = -glm::asin(tipDirection.y);
            float yawSign = glm::sign(-tipDirection.x);
            float yaw = glm::acos(-tipDirection.z) *
                        ((yawSign == 0.0f) ? 1.0f : yawSign);
            glm::quat orientation = glm::quat(glm::vec3(pitch, yaw, 0.0f));
            renderReticle(orientation, _alpha);
        } 
    }

    //Mouse Pointer
    if (_reticleActive[MOUSE]) {
        glm::vec2 projection = screenToSpherical(glm::vec2(_reticlePosition[MOUSE].x(),
                                                           _reticlePosition[MOUSE].y()));
        glm::quat orientation(glm::vec3(-projection.y, projection.x, 0.0f));
        renderReticle(orientation, _alpha);
    }

    glEnable(GL_DEPTH_TEST);
}

//Caculate the click location using one of the sixense controllers. Scale is not applied
QPoint ApplicationOverlay::getPalmClickLocation(const PalmData *palm) const {
    Application* application = Application::getInstance();
    GLCanvas* glWidget = application->getGLWidget();
    MyAvatar* myAvatar = application->getAvatar();

    glm::vec3 tip = myAvatar->getLaserPointerTipPosition(palm);
    glm::vec3 eyePos = myAvatar->getHead()->getEyePosition();
    glm::quat invOrientation = glm::inverse(myAvatar->getOrientation());
    //direction of ray goes towards camera
    glm::vec3 dir = invOrientation * glm::normalize(application->getCamera()->getPosition() - tip);
    glm::vec3 tipPos = invOrientation * (tip - eyePos);

    QPoint rv;

    if (OculusManager::isConnected()) {
        float t;

        //We back the ray up by dir to ensure that it will not start inside the UI.
        glm::vec3 adjustedPos = tipPos - dir;
        //Find intersection of crosshair ray. 
        if (raySphereIntersect(dir, adjustedPos, _oculusUIRadius * myAvatar->getScale(), &t)){
            glm::vec3 collisionPos = adjustedPos + dir * t;
            //Normalize it in case its not a radius of 1
            collisionPos = glm::normalize(collisionPos);
            //If we hit the back hemisphere, mark it as not a collision
            if (collisionPos.z > 0) {
                rv.setX(INT_MAX);
                rv.setY(INT_MAX);
            } else {

                float u = asin(collisionPos.x) / (_textureFov)+0.5f;
                float v = 1.0 - (asin(collisionPos.y) / (_textureFov)+0.5f);

                rv.setX(u * glWidget->width());
                rv.setY(v * glWidget->height());
            }
        } else {
            //if they did not click on the overlay, just set the coords to INT_MAX
            rv.setX(INT_MAX);
            rv.setY(INT_MAX);
        }
    } else {
        glm::dmat4 projection;
        application->getProjectionMatrix(&projection);

        glm::vec4 clipSpacePos = glm::vec4(projection * glm::dvec4(tipPos, 1.0));
        glm::vec3 ndcSpacePos;
        if (clipSpacePos.w != 0) {
            ndcSpacePos = glm::vec3(clipSpacePos) / clipSpacePos.w;
        }

        rv.setX(((ndcSpacePos.x + 1.0) / 2.0) * glWidget->width());
        rv.setY((1.0 - ((ndcSpacePos.y + 1.0) / 2.0)) * glWidget->height());
    }
    return rv;
}

vec2 getPolarCoordinates(const PalmData& palm) {
    MyAvatar* myAvatar = DependencyManager::get<AvatarManager>()->getMyAvatar();
    auto avatarOrientation = myAvatar->getOrientation();
    auto eyePos = myAvatar->getDefaultEyePosition();
    glm::vec3 tip = myAvatar->getLaserPointerTipPosition(&palm);
    // Direction of the tip relative to the eye
    glm::vec3 tipDirection = tip - eyePos;
    // orient into avatar space
    tipDirection = glm::inverse(avatarOrientation) * tipDirection;
    // Normalize for trig functions
    tipDirection = glm::normalize(tipDirection);
    // Convert to polar coordinates
    glm::vec2 polar(glm::atan(tipDirection.x, -tipDirection.z), glm::asin(tipDirection.y));
    return polar;
}