aogl.vert

#version 430 core

#define POSITION	0
#define NORMAL		1
#define TEXCOORD	2
#define FRAG_COLOR	0

precision highp float;
precision highp int;

uniform mat4 MVP;
uniform mat4 MV;
uniform float Time;
uniform int InstanceCount;

const float PI = 3.14159265359;
const float TWOPI = 6.28318530718;
const float PI_2 = 1.57079632679;
const float SQUARE_SIZE = 10.0;

//layout(std140, column_major) uniform;

layout(location = POSITION) in vec3 Position;
layout(location = NORMAL) in vec3 Normal;
layout(location = TEXCOORD) in vec2 Texcoord;

out block
{
	flat int InstanceId;
	vec2 Texcoord;
	vec3 CameraSpacePosition;
	vec3 CameraSpaceNormal;
} Out;

void main()
{
	Out.Texcoord = Texcoord;
	vec3 p = Position;
	vec3 n = Normal;
	float t = Time + gl_InstanceID;
	t = 0;
	float ct = cos(t);
	float st = sin(t);
	p.x = Position.x * ct + Position.z * st;
	p.z = -Position.x * st + Position.z * ct;
	n.x = Normal.x * ct + Normal.z * st;
	n.z = -Normal.x * st + Normal.z * ct;
	n.y = Normal.y;

	float square = sqrt(InstanceCount);
	float square_delta = 2.0;

	if (gl_InstanceID > 0) {
		p.x +=  square_delta * floor(gl_InstanceID / square) - square;
		p.z +=  square_delta * (gl_InstanceID - (square * floor(gl_InstanceID/square))) - square;
		p.y += 1; //sin(floor(gl_InstanceID / square)) + sin((gl_InstanceID - (square * floor(gl_InstanceID/square)))) ;
	}

	Out.CameraSpacePosition = vec3(vec4(p, 1.0));
	Out.CameraSpaceNormal = vec3(vec4(n, 0.0));
	Out.InstanceId = gl_InstanceID;
	gl_Position = MVP * vec4(p, 1.0);
}