diff options
Diffstat (limited to 'tests/manual/examples/opengl/qopenglwindow/background.frag')
-rw-r--r-- | tests/manual/examples/opengl/qopenglwindow/background.frag | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/tests/manual/examples/opengl/qopenglwindow/background.frag b/tests/manual/examples/opengl/qopenglwindow/background.frag new file mode 100644 index 0000000000..4af85aae8e --- /dev/null +++ b/tests/manual/examples/opengl/qopenglwindow/background.frag @@ -0,0 +1,30 @@ +#define M_PI 3.14159265358979323846 +#define SPEED 10000.0 + +uniform int currentTime; +uniform highp vec2 windowSize; + +highp float noise(highp vec2 co) +{ + return 0.5 * fract(sin(dot(co.xy, vec2(12.9898,78.233))) * 43758.5453); +} + +highp float curvSpeed() +{ + return (mod(float(currentTime), SPEED) / SPEED) * (2.0 * M_PI); +} + +highp float curv(int curvCount) +{ + 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(0.85, 1.0, (curv(6) + 1.0) * (coordNoise )); + highp vec3 color = vec3(coordNoise) * proximity; + gl_FragColor = vec4(color, 1.0); +} |