如何在Python OpenGL中移动箭头的原点？

编程问答 2022-06-10

问题描述

我编写了一个在屏幕上绘制箭头的功能。现在，我要朝特定方向绘制它。对于以下 vertex_array ，它将在屏幕上绘制一个箭头。

DELIMITER $$

DROP PROCEDURE IF EXISTS `deleteSubscriber` $$

CREATE PROCEDURE `deleteSubscriber`(_id INTEGER,_operator VARCHAR(2))
   BEGIN
     # Delete subscribers
     SET @subscribers = CONCAT('DELETE FROM subscribers WHERE id ',_operator,' ',_id);
     PREPARE deleteSubscribers FROM @subscribers;
     EXECUTE deleteSubscribers;
     DEALLOCATE PREPARE deleteSubscribers;

     # Delete subscriber_packages
     SET @subscriberPackages = CONCAT('DELETE FROM subscriber_packages WHERE subscriber_id ',_id);
     PREPARE deleteSubscriberPackages FROM @subscriberPackages;
     EXECUTE deleteSubscriberPackages;
     DEALLOCATE PREPARE deleteSubscriberPackages;

     ...
   END$$
DELIMITER ;

enter image description here

现在如何编写函数以面对特定方向以特定坐标投影此数组？

喜欢以下内容：

vertex_array = [-0.3,0.0,0.3,0.1,-0.5,-0.1,0.0
                ]

解决方法

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