From d5b216d9d6d2b8cb93106e8f8ca351089d05b41d Mon Sep 17 00:00:00 2001 From: Nivesh Rajbhandari Date: Wed, 22 Feb 2012 11:52:31 -0800 Subject: Integrating canvas-2d and WebGL drawing fixes. Also adding back WebGL materials. Signed-off-by: Nivesh Rajbhandari --- assets/shaders/Water.frag.glsl | 55 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 55 insertions(+) create mode 100644 assets/shaders/Water.frag.glsl (limited to 'assets/shaders/Water.frag.glsl') diff --git a/assets/shaders/Water.frag.glsl b/assets/shaders/Water.frag.glsl new file mode 100644 index 00000000..5b71a658 --- /dev/null +++ b/assets/shaders/Water.frag.glsl @@ -0,0 +1,55 @@ +#ifdef GL_ES +precision highp float; +#endif + +uniform sampler2D u_tex0; +uniform float u_time; +uniform vec2 u_resolution; + +const float speedx = 1./ 0.1; +const float speedy = 1./ .01; +const float speedr = 1./ 0.01; +const float delta = 20.; +const float intence = 10.; +const int dif = 7; + +float col(vec2 coord) +{ + float delta_theta = 3.1415926535897932 / float(dif); + float col = 0.; + float theta = 0.; + theta = u_time/200.; + + coord.x += u_time/speedx; + coord.y += u_time/speedy; + for (int i = 0; i < dif; i++) + { + coord.x += u_time/speedr; + theta = theta + delta_theta; + col = col + cos( (coord.x*cos(theta) - coord.y*sin(theta))*20. ); + } + + return cos(col); +} + +void main(void) +{ + vec2 p = (gl_FragCoord.xy) / u_resolution.xy; + + vec2 c1 = p; + vec2 c2 = p; + + c2.x = c2.x+u_resolution.x/delta; + float dx = (col(c1)-col(c2))/delta; + + c2 = p; + c2.y = c2.y + u_resolution.y/delta; + float dy = (col(c1)-col(c2))/delta; + + c1.x = c1.x+dx; + c1.y = -(c1.y+dy); + + float alpha = 1.+dot(dx,dy)*intence; + if (alpha < 0.7) alpha = 0.7; + gl_FragColor = texture2D(u_tex0,c1)*(alpha); +} -- cgit v1.2.3