/** * Example Fragment Shader * Sets the color and alpha of the pixel by setting gl_FragColor */ // Set the precision for data types used in this shader precision highp float; precision highp int; // Default THREE.js uniforms available to both fragment and vertex shader uniform mat4 modelMatrix; uniform mat4 modelViewMatrix; uniform mat4 projectionMatrix; uniform mat4 viewMatrix; uniform mat3 normalMatrix; // Default uniforms provided by ShaderFrog. uniform vec3 cameraPosition; uniform float time; // A uniform unique to this shader. You can modify it to the using the form // below the shader preview. Any uniform you add is automatically given a form uniform vec2 objectPos; uniform float speed; uniform float rotation; // Example varyings passed from the vertex shader varying vec3 vPosition; varying vec3 vNormal; varying vec2 vUv; varying vec2 vUv2; float pi = 3.14159; float angleDiff(float a, float b){ float x = abs(a-b); if (x < pi){ return x; }else{ return 2.*pi - x; } } float angleDiff2(float a, float b){ float x = a-b; if (x < pi){ return x; }else{ return pi - x; } } float countDown = 1.0; bool swept = false; bool visible = false; void main() { // Calculate the real position of this pixel in 3d space, taking into account // the rotation and scale of the model. It's a useful formula for some effects. // This could also be done in the vertex shader vec3 worldPosition = ( modelMatrix * vec4( vPosition, 1.0 )).xyz; // Calculate the normal including the model rotation and scale vec3 worldNormal = normalize( vec3( modelMatrix * vec4( vNormal, 0.0 ) ) ); // An example simple lighting effect, taking the dot product of the normal // (which way this pixel is pointing) and a user generated light position vec3 r = vec3(vPosition.x, vPosition.y, vPosition.z); //vec3 r = vec3(worldPosition.x, worldPosition.y, worldPosition.z); mat4 mMatrix = mat4(1.,0.,0.,0., 0.,rotation,0.,0., 0.,0.,1.,0., 0.,0.,0.,1.); vec3 r2 = (mMatrix * vec4(r, 1.0)).xyz; float r2mag = length(r2); vec3 color = vec3(0.); // rings for (float i=0.0; i<= 5.; i+=1.){ if (r2mag > 0.2*i-0.03 && r2mag < 0.2*i){ color.y = (-r2.y+1.)/2.; } } float sweepPosX = sin(time); // swwep horizontal /*if( r2.x > sweepPosX && r2.x < sweepPosX+0.05 && r2.y < 0.8 && r2.y > -0.8 && r2mag < 0.8){ color.y = (-r2.y+1.)/2.; }*/ float rAngle = atan(r2.y, r2.x); float sweepAngle = atan(cos(speed*time), sin(speed*time)); //float ad = angleDiff(rAngle, sweepAngle); float ad = abs(angleDiff(rAngle, sweepAngle)); if (ad < 0.1 && r2mag < 1.0){ color.y = (-r2.y+1.)/2.; } vec3 objectPosition = vec3(objectPos.x, objectPos.y, 0.); vec3 rDif = objectPosition - r2; vec3 r2Dif = (mMatrix * vec4(rDif, 1.0)).xyz; vec3 pObj = (mMatrix * vec4(objectPosition, 1.0)).xyz; float objAngle = atan(pObj.y, pObj.x); if (length(r2Dif) < 0.05 && angleDiff2(objAngle, sweepAngle) > 0.1 && length(objectPosition)< 1.0){ float spotBrightness = (pi-angleDiff(objAngle, sweepAngle))/pi; if (spotBrightness < 0.0) spotBrightness = 0.0; color.x = spotBrightness; } // Fragment shaders set the gl_FragColor, which is a vector4 of // ( red, green, blue, alpha ). gl_FragColor = vec4( color, 1. ); }

asd123's Shaders (2)