![\"\"](\"http:\/\/www.gisdeveloper.co.kr\/wp-content\/uploads\/2025\/05\/20250501_081002.jpg\")
<\/p>\n<\/p>\n
\r\nuniform vec3 uResolution;\r\nuniform float uTime;\r\nuniform vec4 uMouse;\r\n\r\n\/\/ v = a -> 0\r\n\/\/ v = b -> 1 \r\n\/\/ v = (a+b)\/2 -> 0.5\r\nfloat remap01(float a, float b, float v) {\r\n return (v - a) \/ (b - a);\r\n}\r\n\r\nvoid main() {\r\n vec2 uv = (gl_FragCoord.xy - .5 * uResolution.xy) \/ uResolution.y;\r\n\r\n vec3 col = vec3(0);\r\n vec3 Ro = vec3(0);\r\n vec3 Rd = normalize(vec3(uv.x, uv.y, 1.));\r\n vec3 S = vec3(0, 0, 3);\r\n float R = 1.;\r\n\r\n float tp = dot(S - Ro, Rd);\r\n vec3 Ptp = Ro + Rd * tp;\r\n float y = length(S - Ptp);\r\n \r\n if(y < R) {\r\n float x = sqrt(R*R - y*y);\r\n float t1 = tp - x;\r\n float t2 = tp + x;\r\n\r\n float c = remap01(S.z, S.z - R, t1);\r\n col = vec3(c);\r\n }\r\n \r\n gl_FragColor = vec4(col, 1.0);\r\n}\r\n<\/pre>\n\uacb0\uacfc<\/h3>\n
![\"\"](\"http:\/\/www.gisdeveloper.co.kr\/wp-content\/uploads\/2025\/05\/\u1109\u1173\u110f\u1173\u1105\u1175\u11ab\u1109\u1163\u11ba-2025-05-01-08.50.13.png\")
<\/p>\n","protected":false},"excerpt":{"rendered":"
\uc218\uc2dd \ucf54\ub4dc uniform vec3 uResolution; uniform float uTime; uniform vec4 uMouse; \/\/ v = a -> 0 \/\/ v = b -> 1 \/\/ v = (a+b)\/2 -> 0.5 float remap01(float a, float b, float v) { return (v – a) \/ (b – a); } void main() { vec2 uv = (gl_FragCoord.xy – .5 … <\/p>\n