vb01/particle.vert

#version 330 core

layout (location=0) in vec3 aPos;
layout (location=1) in vec2 aTexCoords;
layout (location=2) in mat4 aInstancedModel;

out vec2 texCoords;

flat out int id;

uniform mat4 proj;
uniform mat4 view;
//uniform mat4 model[4];
uniform float lifePercentage[500];
uniform vec3 trans[500];
//uniform vec2 size[500];
uniform vec2 startSize;
uniform vec2 endSize;

void main(){
	vec3 camLeft=vec3(view[0][0],view[1][0],view[2][0]);	
	vec3 camUp=vec3(view[0][1],view[1][1],view[2][1]);	

	id=gl_InstanceID;
	vec2 s=startSize+(endSize-startSize)*lifePercentage[id];
	vec3 v=camLeft*s.x*aPos.x+camUp*s.y*aPos.y;
	mat4 model=aInstancedModel;
	model[3][0]=trans[gl_InstanceID].x;
	model[3][1]=trans[gl_InstanceID].y;
	model[3][2]=trans[gl_InstanceID].z;
/*
*/
	gl_Position=proj*view*model*vec4(v,1);	
	//gl_Position=proj*view*model[gl_InstanceID]*vec4(s.x*aPos.x,s.y*aPos.y,aPos.z,1);	
	texCoords=aTexCoords;
}