diff options
Diffstat (limited to 'examples/opengl/qopenglwindow/background.frag')
-rw-r--r-- | examples/opengl/qopenglwindow/background.frag | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/examples/opengl/qopenglwindow/background.frag b/examples/opengl/qopenglwindow/background.frag index 572c941f08..eecb6d3120 100644 --- a/examples/opengl/qopenglwindow/background.frag +++ b/examples/opengl/qopenglwindow/background.frag @@ -1,3 +1,6 @@ +#define M_PI 3.1415926535897932384626433832795 +#define SPEED 10000.0 + uniform int currentTime; uniform highp vec2 windowSize; @@ -8,18 +11,20 @@ highp float noise(highp vec2 co) highp float curvSpeed() { - return mod(float(currentTime), 1000000.0) / 500.0; + return (mod(float(currentTime), SPEED) / SPEED) * (2.0 * M_PI); } -highp float curv() +highp float curv(int curvCount) { - return 1.0 - abs((gl_FragCoord.y / (windowSize.y / 10.0) - 5.0) - sin((gl_FragCoord.x / (windowSize.x/20.0)) - curvSpeed())); + highp float curv_y = 0.1 *(cos((gl_FragCoord.x / windowSize.x) * (float(curvCount * 2) * M_PI) - curvSpeed())) + 0.5; + highp float frag_y = gl_FragCoord.y / windowSize.y; + return 1.0 - abs(curv_y - frag_y); } void main() { highp float coordNoise = noise(gl_FragCoord.xy); - highp float proximity = smoothstep(0.5, 1.0, (curv() + 1.0) * (coordNoise )); + highp float proximity = smoothstep(0.85, 1.0, (curv(6) + 1.0) * (coordNoise )); highp vec3 color = vec3(coordNoise) * proximity; gl_FragColor = vec4(color, 1.0); } |