1_2_bilerp
コード 1.3, 図 1.4:
1_2_bilerp.frag
#version 300 esprecision highp float;out vec4 fragColor;uniform float u_time;uniform vec2 u_resolution;void main(){vec2 pos = gl_FragCoord.xy / u_resolution.xy;vec3[4] col4 = vec3[](vec3(1.0, 0.0, 0.0),vec3(0.0, 0.0, 1.0),vec3(0.0, 1.0, 0.0),vec3(1.0, 1.0, 0.0));vec3 col = mix(mix(col4[0], col4[1], pos.x), mix(col4[2], col4[3], pos.x), pos.y);fragColor = vec4(col, 1.0);}