Merge pull request #48 from dual-wield-ray/dev/logo

Replace python logo with a draft one

docs/conf.py

@@ -64,7 +64,7 @@
     'code_highlight': '#FF8C00',
     'description': 'A Python scripting interface for creating drum sheet music',
     'logo_name': True,
-    'logo': 'python-logo-only.png',
+    'logo': 'logo.png',
 }
 
 # -- Add all relevant modules to PATH for autodoct ---------------------------

logo.glsl

@@ -0,0 +1,120 @@
+#define PI 3.1415926538
+#ifdef GL_ES
+precision mediump float;
+#endif
+
+uniform vec2 u_resolution;
+uniform float u_time;
+
+float stroke(float x, float s, float w){
+    float d = step(s, x+w*.5)
+            - step(s, x-w*.5);
+
+    return clamp(d, 0., 1.);
+}
+
+float circle(vec2 uv, vec2 pos, float rad) {
+
+    vec2 pos_diff = pos - uv;
+    float theta = atan(pos_diff.y, pos_diff.x);
+    float d = length(pos_diff);
+
+	return 1. -smoothstep(rad-(rad*0.01),
+                         rad+(rad*0.01),
+                         d);
+}
+
+vec4 snake(vec2 uv, vec2 pos, float rad, vec3 color) {
+
+    // Get pixel info
+    vec2 pos_diff = pos - uv;
+    float theta = atan(pos_diff.y, pos_diff.x);
+    float d = length(pos_diff);
+
+    // Tail smoothing
+    float tail_start = radians(0. - u_time * 5.);
+    float tail_end = tail_start + radians(45.);
+    float tail_var = smoothstep(tail_start, tail_end, theta);
+    tail_var *= 1. - step(tail_end, theta);  // no tail var past the range
+
+    // Head
+    float head_start = tail_end;
+    float head_middle = head_start + radians(10.0);
+    float head_end = head_middle + radians(5.0);
+    float head_var = smoothstep(head_start, head_middle, theta)
+                   - smoothstep(head_middle, head_end, theta);
+    head_var *= 1. - step(head_end, theta);
+
+    // Main wave
+    float amp = 4.0;
+    float period = 12.0;
+
+    // Offset to get the right look
+    float wave_offset = radians(270. + u_time * 150.);
+
+    // Offset radian val by sine wave
+    rad += sin(period * theta + wave_offset) * amp;
+
+    // Get the value with the head and tail vars
+    float tail_mult = 8.;
+    float head_mult = 15.;
+    float rad_t = rad - tail_var * tail_mult
+                      + head_var * head_mult;
+
+    // Apply smoothing and get value for the outer rad
+	float t = 1. -smoothstep(rad_t-(rad_t*0.01),
+                         rad_t+(rad_t*0.01),
+                         d);
+
+    // Inner section
+    float thickness = 35.5;
+
+    // thickness *= tail_var;
+
+    rad -= thickness;
+    rad_t = rad + (tail_var * tail_mult) - (head_var * head_mult);
+	float t2 = 1. -smoothstep(rad_t-(rad_t*0.01),
+                         rad_t+(rad_t*0.01),
+                         d);
+
+    // Subtract to get only within the snake
+    t = t - t2;
+
+    return vec4(color, t);
+}
+
+void main() {
+
+	vec2 uv = gl_FragCoord.xy;
+    vec2 st = gl_FragCoord.xy/u_resolution;
+	vec2 center = u_resolution.xy * 0.5;
+
+    // Background layer
+	vec4 layer1 = vec4(vec3(1.), 1.0);
+
+    // Snake diagram
+	vec3 snake_color = vec3(0.4078, 0.5373, 0.3333);
+	float radius = 0.35 * u_resolution.y;
+	vec4 layer2 = snake(uv, center, radius, snake_color);
+
+    // Drumsticks
+    float drumstick_thickness = 0.035;
+    float sdf = 0.5 + (st.x - 1.75*st.y)*.5;
+    float is_drumstick = stroke(sdf, 0.5, drumstick_thickness);
+    float sdf_inv = (st.x + 1.75*st.y)*.5;
+    is_drumstick += stroke(sdf_inv, .5, drumstick_thickness);
+    is_drumstick = clamp(is_drumstick, 0., 1.);
+
+    is_drumstick *= step(0.1, st.x);
+    is_drumstick *= 1. - step(0.9, st.x);
+    is_drumstick *= step(0.15, st.y);
+
+    vec4 layer3 = vec4(vec3(0.8431, 0.7412, 0.4745), is_drumstick);
+
+
+	// Blend background and snake
+	gl_FragColor = mix(layer1, layer2, layer2.a);
+
+    gl_FragColor = mix(gl_FragColor, layer3, layer3.a);
+
+}