Shader

The lacking game engine uses a custom shading language. This language is then transpiled to the respective GPU API shader language (e.g. GLSL, WGSL). The syntax of the language is very similar to the Go syntax, though there are some notable differences. Using Go-like syntax allows one to write in a consistent way game code and shader code. Furthemore, the Go syntax is designed to be easily and unambiguously parsable.

Types

The following table lists the supported built-in types.

Name	Description
bool	Boolean type
int	32 bit signed integer type
uint	32 bit unsigned integer type
float	32 bit floating point type
vec2	2D vector type with two 32 bit floating point components
vec3	3D vector type with three 32 bit floating point components
vec4	4D vector type with four 32 bit floating point components
bvec2	2D vector type with two boolean components
bvec3	3D vector type with three boolean components
bvec4	4D vector type with four boolean components
ivec2	2D vector type with two 32 bit signed integer components
ivec3	3D vector type with three 32 bit signed integer components
ivec4	4D vector type with four 32 bit signed integer components
uvec2	2D vector type with two 32 bit unsigned integer components
uvec3	3D vector type with three 32 bit unsigned integer components
uvec4	4D vector type with four 32 bit unsigned integer components
mat2	2x2 matrix type with four 32 bit floating point components
mat3	3x3 matrix type with nine 32 bit floating point components
mat4	4x4 matrix type with sixteen 32 bit floating point components
sampler2D	sampler to a 2D texture
samplerCube	sampler to a Cube texture

Functions

The following table lists built-in functions.

Name	Variants	Description
sin(float)	sin(vec2), sin(vec3), sin(vec4)	Returns the sine of a value
cos(float)	cos(vec2), cos(vec3), cos(vec4)	Returns the cosine of a value