some fine tune shaders

Shaders/1-input/hsv_control_fine.frag

@@ -0,0 +1,59 @@
+//1-input
+#ifdef GL_ES
+precision mediump float;
+#endif
+
+varying vec2 v_texcoord;
+uniform sampler2D u_tex0;
+uniform sampler2D u_tex1;
+uniform vec2 u_resolution;
+uniform float u_time;
+uniform float u_x0;
+uniform float u_x1;
+uniform float u_x2;
+uniform float u_x3;
+
+vec3 rgb2grayscale(vec3 c)
+{
+    return(vec3(dot(c, vec3(0.299, 0.587, 0.114))));
+}
+
+vec3 rgb2hsv(vec3 c)
+{
+    vec4 K = vec4(0.0, -1.0 / 3.0, 2.0 / 3.0, -1.0);
+    vec4 p = mix(vec4(c.bg, K.wz), vec4(c.gb, K.xy), step(c.b, c.g));
+    vec4 q = mix(vec4(p.xyw, c.r), vec4(c.r, p.yzx), step(p.x, c.r));
+
+    float d = q.x - min(q.w, q.y);
+    float e = 1.0e-10;
+    return vec3(abs(q.z + (q.w - q.y) / (6.0 * d + e)), d / (q.x + e), q.x);
+}
+
+vec3 hsv2rgb(vec3 c)
+{
+    vec4 K = vec4(1.0, 2.0 / 3.0, 1.0 / 3.0, 3.0);
+    vec3 p = abs(fract(c.xxx + K.xyz) * 6.0 - K.www);
+    return c.z * mix(K.xxx, clamp(p - K.xxx, 0.0, 1.0), c.y);
+}
+
+void main(){
+
+vec2 pos = v_texcoord;
+vec4 color = texture2D(u_tex0, pos);
+
+vec3 hsv = rgb2hsv(color.rgb);
+hsv.x += 0.1*u_x0 - 0.05;
+hsv.y += 0.1*u_x1 - 0.05;
+hsv.z += 0.1*u_x2 - 0.05;
+//hsv.x += -0.2;
+vec3 rgb = hsv2rgb(hsv.xyz);
+
+
+gl_FragColor = vec4(rgb, color.a);
+
+}
+
+
+
+
+

Shaders/1-input/rotate_fine.frag

@@ -0,0 +1,54 @@
+//1-input
+#ifdef GL_ES
+precision mediump float;
+#endif
+
+varying vec2 v_texcoord;
+uniform sampler2D u_tex0;
+uniform sampler2D u_tex1;
+uniform vec2 u_resolution;
+uniform float u_time;
+uniform float u_x0;
+uniform float u_x1;
+uniform float u_x2;
+uniform float u_x3;
+
+vec4 rotate(sampler2D tex, vec2 pos){
+
+    vec4 texColourRotate;
+    vec2 center;
+    //center = vec2(u_x3 / u_resolution.x, u_x4 / u_resolution.y);
+    center = vec2(0.45 + 0.1*u_x1,0.45 + 0.1*u_x2);
+
+    pos.x = (pos.x - center.x)*(0.5 / (0.45 + 0.1*u_x3)) + center.x;
+    pos.y = (pos.y - center.y)*(0.5 / (0.45 + 0.1*u_x3)) + center.y;
+
+    float r = distance(center, pos);
+    float a = atan(pos.x - center.x, pos.y - center.y);
+
+    pos.x = r * cos(a + 2.0 * 3.141592 * (0.2 + 0.1*u_x0)) + 0.5;
+    pos.y = r * sin(a + 2.0 * 3.141592 * (0.2 + 0.1*u_x0)) + 0.5;
+    pos.x = 1.0 - pos.x;
+    if((pos.x < 0.0)||(pos.y < 0.0)||(pos.x > 1.0)||(pos.y > 1.0)){
+        texColourRotate = vec4(0.0);
+    }
+    else{
+        texColourRotate = texture2D(tex, pos);
+    }
+    return texColourRotate;
+}
+
+void main(){
+
+    vec2 pos = v_texcoord;
+    vec4 texColour0;
+    texColour0 = rotate(u_tex0, v_texcoord);
+
+    gl_FragColor = texColour0; 
+
+}
+
+
+
+
+