# Test proper behavior of the modf(vec3) function.
#
# test modf splits the input values into the two pieces and
# returns them correctly.

[require]
GLSL >= 1.30

[vertex shader]
#version 130
varying vec4 color;
uniform vec3 value;
uniform vec3 expected1;
uniform vec3 expected2;
uniform float tolerance;

void main()
{
  gl_Position = gl_Vertex;
  vec3 temp, tempi;
  bool b1, b2;
  temp = modf(value, tempi);
  b1 = distance(tempi, expected1) < tolerance;
  b2 = distance(temp, expected2) < tolerance;
  color = vec4(b1, b2, 0.0, 1.0);
}

[fragment shader]
varying vec4 color;

void main()
{
  gl_FragColor = color;
}

[test]
uniform vec3 value 1.5 0.5 2.5
uniform vec3 expected1 1.0 0.0 2.0
uniform vec3 expected2 0.5 0.5 0.5
uniform float tolerance 0.0041452078
draw rect -1 -1 2 2
probe rgba 0 0 1.0 1.0 0.0 1.0

uniform vec3 value -1.33 0.75 10.3333
uniform vec3 expected1 -1.0 0.0 10.0
uniform vec3 expected2 -0.33 0.75 0.3333
uniform float tolerance 0.0041452078
draw rect -1 -1 2 2
probe rgba 1 0 1.0 1.0 0.0 1.0