Built-in functions | Clamp - Shader Learning

Clamp

Write a GLSL program that draws a diagonal line from the bottom left corner of the texture to the top right corner. The line should have a width of 0.2 in normalized coordinates and be colored in (1.0, 0.3, 0.3). Additionally, ensure that the line is limited to values between 0.25 and 0.75 in Y coordinate.

Requirements

The shader should avoid using branching or conditional statements in its code.

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fragment.glsl

uniform vec2 iResolution;

void main() {

vec2 uv = gl_FragCoord.xy / iResolution.xy;

float lineWidth = 0.2;

vec3 lineColor = vec3(1.0, 0.3, 0.3);

gl_FragColor = vec4(0.0, 0.0, 0.0, 1.0);

}

Expected

Output