Improve the sun shader with the help of AI

1 files changed, 39 insertions, 1 deletions

diff --git a/themes/src/shaders/sun_frag.cpp b/themes/src/shaders/sun_frag.cpp
index d1ea160..30553e0 100644
--- a/themes/src/shaders/sun_frag.cpp
+++ b/themes/src/shaders/sun_frag.cpp
@@ -1,8 +1,46 @@
 #include "sun_frag.h"
 
 const char* shader_sun_frag = "varying lowp vec4 VertexColor; \n"
+"varying lowp vec2 TexCoord; \n"
+"uniform lowp float time; \n"
+" \n"
+"// Simple noise function for edge distortion \n"
+"lowp float noise(lowp vec2 p) { \n"
+"    return sin(p.x * 10.0 + time) * cos(p.y * 10.0 + time * 0.5) * 0.5 + 0.5; \n"
+"} \n"
 " \n"
 "void main() { \n"
-"    gl_FragColor = VertexColor; \n"
+"    // TexCoord is now normalized: center is (0,0), edges are at distance ~1 \n"
+"    lowp float dist = length(TexCoord); \n"
+" \n"
+"    // Add animated noise to the edge \n"
+"    lowp float angle = atan(TexCoord.y, TexCoord.x); \n"
+"    lowp float wave = sin(angle * 8.0 + time * 2.0) * 0.05 + sin(angle * 4.0 - time * 1.5) * 0.03; \n"
+"    lowp float noiseValue = noise(TexCoord + time * 0.1) * 0.02; \n"
+" \n"
+"    // Create soft edge using smoothstep - ensure fade reaches zero at the actual edge \n"
+"    lowp float innerEdge = 0.2; \n"
+"    lowp float outerEdge = 1.0; \n"
+"    lowp float alpha = 1.0 - smoothstep(innerEdge, outerEdge, dist); \n"
+" \n"
+"    // Apply wave distortion to the edge \n"
+"    alpha *= 1.0 - smoothstep(0.85 + wave + noiseValue * 2.0, 1.0, dist); \n"
+" \n"
+"    // Make edges even more transparent with additional fade \n"
+"    alpha = alpha * alpha * alpha; \n"
+" \n"
+"    // Add slight glow effect at the edge \n"
+"    lowp float glow = smoothstep(0.5, 0.8, dist) * (1.0 - smoothstep(0.8, 1.0, dist)); \n"
+" \n"
+"    // Create orange gradient from center \n"
+"    lowp vec3 orangeColor = vec3(1.0, 0.5, 0.1); \n"
+"    lowp float centerGradient = smoothstep(0.6, 0.0, dist); \n"
+"    lowp vec3 baseColor = mix(VertexColor.rgb, orangeColor, centerGradient * 0.6); \n"
+" \n"
+"    // Mix in the glow with a brighter color \n"
+"    lowp vec3 glowColor = baseColor * 1.3; \n"
+"    lowp vec3 finalColor = mix(baseColor, glowColor, glow * 0.5); \n"
+" \n"
+"    gl_FragColor = vec4(finalColor, VertexColor.a * alpha); \n"
 "} \n"
 " \n";