[해피CGI][cgimall] WebGL Blackhole

 

마우스를 따라 다니는 블랙홀 디자인 입니다.
간단한 배경 애니메이션이 필요하실 때 사용 해도 좋을거 같습니다.

자세한 내용은 데모에서 확인할 수 있습니다.


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<script id="2d-fragment-shader" type="x-shader/x-fragment">// <![CDATA[   // Look below at line 23 for realism.   #ifdef GL_ES precision mediump float; #endif   #define PI 3.14159265359   uniform sampler2D u_image; varying vec2 v_texCoord;   uniform vec2 u_resolution; uniform vec2 u_mouse; uniform float u_mass; uniform float u_time; uniform float u_clickedTime;   vec2 rotate(vec2 mt, vec2 st, float angle){ float cos = cos((angle + u_clickedTime) * PI); // try replacing * 1.0 with * PI float sin = sin(angle * 0.0); // try removing the * 0.0   // Uncomment these two lines for realism //float cos = cos(angle) * (u_time * 0.3); //float sin = sin(angle) * (u_time * 0.3);   float nx = (cos * (st.x - mt.x)) + (sin * (st.y - mt.y)) + mt.x; float ny = (cos * (st.y - mt.y)) - (sin * (st.x - mt.x)) + mt.y; return vec2(nx, ny); }   void main() {      vec2 st = vec2(gl_FragCoord.x, u_resolution.y - gl_FragCoord.y)/u_resolution; vec2 mt = vec2(u_mouse.x, u_resolution.y - u_mouse.y)/u_resolution;   float dx = st.x - mt.x; float dy = st.y - mt.y;   float dist = sqrt(dx * dx + dy * dy); float pull = u_mass / (dist * dist);        vec3 color = vec3(0.0);   vec2 r = rotate(mt,st,pull); vec4 imgcolor = texture2D(u_image, r); color = vec3( (imgcolor.x - (pull * 0.25)), (imgcolor.y - (pull * 0.25)),  (imgcolor.z - (pull * 0.25)) );          gl_FragColor = vec4(color,1.); } // ]]></script> <script id="2d-vertex-shader" type="x-shader/x-vertex">// <![CDATA[ attribute vec2 a_position; attribute vec2 a_texCoord;   varying vec2 v_texCoord; void main() { gl_Position = vec4(a_position, 0, 1); v_texCoord = a_texCoord; } // ]]></script> <canvas id="glscreen"></canvas>