67 lines
No EOL
1.9 KiB
GLSL
67 lines
No EOL
1.9 KiB
GLSL
// This shader is mostly an adaptation of the shader found at
|
|
// http://www.bonzaisoftware.com/water_tut.html and its glsl conversion
|
|
// available at http://forum.bonzaisoftware.com/viewthread.php?tid=10
|
|
// © Michael Horsch - 2005
|
|
// Major update and revisions - 2011-10-07
|
|
// © Emilian Huminiuc and Vivian Meazza
|
|
|
|
#version 120
|
|
|
|
varying vec4 waterTex1;
|
|
varying vec4 waterTex2;
|
|
|
|
varying vec3 viewerdir;
|
|
varying vec3 lightdir;
|
|
varying vec3 normal;
|
|
|
|
varying vec3 VTangent;
|
|
varying vec3 VBinormal;
|
|
|
|
uniform float osg_SimulationTime;
|
|
uniform float WindE, WindN;
|
|
uniform int rembrandt_enabled;
|
|
|
|
attribute vec3 tangent;
|
|
attribute vec3 binormal;
|
|
|
|
/////// functions /////////
|
|
|
|
void rotationmatrix(in float angle, out mat4 rotmat)
|
|
{
|
|
rotmat = mat4( cos( angle ), -sin( angle ), 0.0, 0.0,
|
|
sin( angle ), cos( angle ), 0.0, 0.0,
|
|
0.0 , 0.0 , 1.0, 0.0,
|
|
0.0 , 0.0 , 0.0, 1.0 );
|
|
}
|
|
|
|
void main(void)
|
|
{
|
|
mat4 RotationMatrix;
|
|
normal = gl_NormalMatrix * gl_Normal;
|
|
VTangent = normalize(gl_NormalMatrix * tangent);
|
|
VBinormal = normalize(gl_NormalMatrix * binormal);
|
|
|
|
viewerdir = vec3(gl_ModelViewMatrixInverse[3]) - vec3(gl_Vertex);
|
|
|
|
vec4 t1 = vec4(0.0, osg_SimulationTime * 0.005217, 0.0, 0.0);
|
|
vec4 t2 = vec4(0.0, osg_SimulationTime * -0.0012, 0.0, 0.0);
|
|
|
|
float Angle;
|
|
|
|
float windFactor = sqrt(WindE * WindE + WindN * WindN) * 0.05;
|
|
|
|
if (WindN == 0.0 && WindE == 0.0) {
|
|
Angle = 0.0;
|
|
}else{
|
|
Angle = atan(-WindN, WindE) - atan(1.0);
|
|
}
|
|
|
|
rotationmatrix(Angle, RotationMatrix);
|
|
waterTex1 = gl_MultiTexCoord0 * RotationMatrix - t1 * windFactor;
|
|
|
|
rotationmatrix(Angle, RotationMatrix);
|
|
waterTex2 = gl_MultiTexCoord0 * RotationMatrix - t2 * windFactor;
|
|
|
|
// fog_Func(fogType);
|
|
gl_Position = ftransform();
|
|
} |