两点透视下的黑白城市
为与七年级学生共同创作这幅采用两点透视法的都市风景画，我们使用了一款带刻度的画框（可在此处下载：链接），它能帮助我们无需借助双三角板即可画出垂直线。
两个消失点均位于地平线上：长度方向的透视线向左侧的消失点（VP1）汇聚，宽度方向的透视线则向右侧的消失点（VP2）汇聚。高度方向的线条必须保持绝对垂直，此时带刻度的画框有助于我们精准控制顶部与底部的尺寸。
绘制起始时，先画出地平线；本例中地平线高度设定为11厘米。该线两端即为消失点VP1与VP2。接着画一条垂直线，作为第一栋建筑的转角线。
随后，我们继续绘制构成各栋建筑的垂直线，其高度各不相同。每栋建筑的宽度方向墙面将朝左侧VP1延伸，长度方向墙面则朝右侧VP2延伸。请将这些透视线画得极细，以便在下一步轻松擦除。
此步骤及后续步骤中不再提供具体尺寸，每位学生均可自由设计属于自己的城市——可包含摩天大楼、普通建筑、广告牌、门洞或窗户等，形式不限。
唯一须遵守的约束是：所有高度方向的线条必须严格保持垂直，所有表现纵深的线条必须准确汇聚至两个消失点。待细节勾勒完毕后，即可用记号笔以黑白两色为城市上色与装饰，通过实色块与留白区域的交替排布营造节奏感。上色时亦可辅以直尺辅助。
这是我们的城市作品，各具特色！
📄 配套练习纸下载
两点透视坐标网格纸（A4 · 1:1 · 26×18cm，打印后用于绘制透视线）
Black & White Cities in Two Points Perspective
To create this urban landscape in two points perspective, with the 7th grade students, we used a graduated frame that you can find here, which allows us to draw vertical lines without the aid of the double set square.
The TWO VANISHING POINTS are positioned on the horizon line: the length lines converge in one point on the left (VP1) while the width lines converge in the other point on the right (VP2). The height lines must remain perfectly VERTICAL and here the graduated frame helps us to control the measurements at the top and bottom.
To begin the drawing we draw the HORIZON LINE, in these drawings it has been drawn at 11cm high. At the two ends of this line are the vanishing points VP1 and VP2. We start by drawing a vertical line which will be THE CORNER of our first building.
Subsequently we proceed to draw the vertical lines that will form the buildings, of various heights. Each building will have walls in width that will go towards VP1 on the left and walls in length that will go towards VP2 on the right. Let’s draw these lines very thin, so that we can erase them easily in the next step.
In this step and in the following no measures are given, each student is free to build his own city with skyscrapers, buildings, advertising signs, gates or windows as he likes.
The only constraint to respect is to keep the height lines perfectly VERTICAL, and to make the depth lines converge towards the two vanishing points. Once the details have been traced, our city can be colored and decorated in black and white with a felt-tip pen, alternating full and empty areas. You can also use a ruler for coloring.
Here are our cities, all different!
📄 配套练习纸下载
两点透视坐标网格纸（A4 · 1:1 · 26×18cm，打印后用于绘制透视线）
