Moving sinusoidal wave plane with GLSL

readme.md

How to run

• Build GlslViewer from source.
• Run glslViewer giving it as input the 3D model for the plane below (created from a grid in Blender):

$ ./glslViewer plane.frag plane.vert plane.obj

• Vertex and fragment shaders files don't exist. So they will be created automatically for you.
• In the vertex shader, add the content of Wave.vert below in the appropriate locations.
• For a better visibility, remove the floor, and add a sky and an axis in glslViewer with floor,off, sky,on, axis,on

plane.mtl

# Blender 3.5.0 MTL File: 'plane.blend'
# www.blender.org

plane.obj

# Blender 3.5.0
# www.blender.org
mtllib plane.mtl
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Wave.vert

uniform float       u_time;

void main() {
    // animated wave shape using sin function        
    // x supposed in [0, 1] => 2pi*x in [0, 2pi], add time to shift curve/animate (angle = 2k*pi + t)     
    // TODO: shading doesn't work, as normals weren't precalculated              
    const float PI = 3.141592;                       
    vec4 position_wave = v_position;                 
    float angle = (2.0*PI * v_position.x) + u_time;  
    position_wave.y = sin(angle);                    
                                                                                                          
    gl_Position = u_projectionMatrix * u_viewMatrix * position_wave;                                      
}