[Tutorial] How to render shapes [World Renderer - Forge 1.19.4 / 1.20.1]

World Renderer allows you to render shapes like lines, triangles and quads in the sky and world. However, for that you need to learn some things

First, you need to use this procedure and decide what to render

Here is what you can render:

• DEBUG_LINE_STRIP
• DEBUG_LINES
• QUADS
• TEXTURE
• TRIANGLE_FAN
• TRIANGLE_STRIP
• TRIANGLES

Next, you need to define some vertices, which contain information about position and color. For example, for a triangle, define 3 of them and for a quadrilateral, define 4 of them. Here is number of vertices required

• DEBUG_LINE: 2
• DEBUG_LINE_STRIP: 2
• QUADS: 4
• TEXTURES: 4
• TRIANGLE_FAN: 3
• TRIANGLE_STRIP: 3
• TRIANGLES: 3

Also, for the world, the position is defined with X/Y/Z coordinates and for the sky, it is defined with yaw/pitch/radius coordinates

An example to render a colorful square:

In addition, shapes have a front and a back, which are defined based on vertex order. Usually, only the front face is visible, the back face is not visible. However, if culling is disabled, both faces will be visible. (See below about culling)

If you define vertices counterclockwise, the face will be a front, and if you define a vertex clockwise, it will be a back

Culling:

When this option is enabled, The back face of shapes is not visible. If you want to display the back face, disable this option

Depth testing:

When this option is enabled, objects will be hided if it is behind obstacles, and when it is disabled, objects will be rendered even if it is