webgl2 precision

precission define can impact the performance and quality or accuracy

low precision

• good performance, my cause bug rendering

hight precision

• bad performance for rendering

pre defined precision can omit the precision define

Vertex shaders

• float
• int
• sampler2D
• samplerCube

fragment shaders

• float
• int
• sampler2D
• samplerCube

`#version 300 es
precision mediump float;
out vec4 fragColor;

void main() {
	fragColor = vec4(1.0, 0.0, 0.0, 1.0);
	}

`#version 300 es
out mediump vec4 fragColor;

void main() {
	fragColor = vec4(1.0, 0.0, 0.0, 1.0);
	}

can be defined for each variable or in global for all.