processing4/java/examples/Topics/Shaders/DomeProjection/data/cubemapvert.glsl

#define PROCESSING_TEXTURE_SHADER

uniform mat4 transform;
uniform mat4 modelview;
uniform mat4 texMatrix;

attribute vec4 vertex;
attribute vec4 color;
attribute vec2 texCoord;
attribute vec3 normal;

varying vec4 vertColor;
varying vec4 vertTexCoord;

uniform mat3 normalMatrix;

varying vec3 reflectDir;

void main() {
  gl_Position = transform * vertex;
    
  vec3 ecNormal = normalize(normalMatrix * normal); // Vertex in eye coordinates
  vec3 ecVertex = vec3(modelview * vertex); // Normal vector in eye coordinates
  vec3 eyeDir = ecVertex.xyz;
  reflectDir = reflect(eyeDir, ecNormal);    
    
  vertColor = color;
  vertTexCoord = texMatrix * vec4(texCoord, 1.0, 1.0);
}



/*
varying vec3 ReflectDir;

void main() {
  gl_Position = ftransform();
  vec3 normal = normalize(gl_NormalMatrix * gl_Normal);
  vec4 pos = gl_ModelViewMatrix * gl_Vertex;
  vec3 eyeDir = pos.xyz;
  ReflectDir = reflect(eyeDir, normal);
}
*/