#version 300 es
precision highp float;
uniform vec4 u_color;
uniform sampler2D u_texture;
uniform int  vr_type;
in float _type;
in float _flag;
in vec3  _pos;
in vec2  _tex;
in vec4  _clr;
out vec4 color;
void main()
{
	if (_type == 1.0)
	{
		vec4  c = texture(u_texture, _tex);
		float a = c.a > 0.8 ? 1.0 : 0.0;
		color = vec4(c.rgb, a);
	}
	else if (_type >= 2.0 && _type < 70.0)
	{
		float k = 1.0; // 渐进衰减
		if (_flag > 110.0)
			k = 0.8;
		else if (_flag > 10.0)
		    k = 1.0 - (_flag-10.0)/500.0;
		vec4  c = texture(u_texture, _tex*_type);
		float a = c.a > 0.8 ? 1.0 : 0.0;
		color = vec4(c.rgb*k, a);
	}
	else if (_type >= 70.0 && _type < 74.0)
	{
		float alpha = _flag / 100.0;
		float h = _clr.a / 170.0;
		float hs = 8.0 * h;
		float hi = floor(hs);
		float f = (hs) - floor(hs);
		float q = 1.0 - f;
		if (hi <= 0.0)
           if(vr_type == 1)
			    color = vec4(0.0, 0.9, 1.0, alpha);
           else
                color = vec4(0.15,0.99,1.0, alpha);
		else if (hi <= 1.0)
           if(vr_type == 1)
			    color = vec4(0.0, f, 0.9, alpha);
           else
			    color = vec4(0.20,0.73,0.92, alpha);
		else if (hi <= 2.0)
           if(vr_type == 1)
			    color = vec4(0.35, 1.0, 0.8, alpha);
           else
			   color = vec4(0.15,0.99,1.0, alpha);
		else
           if(vr_type == 1)
			    color = vec4(0.15, 0.73, 1.0, alpha);
           else
			    color = vec4(0.15,0.99,1.0, alpha);
	}
	else if (u_color.r+u_color.g+u_color.b > 0.01)
		color = u_color;
	else
		color = texture(u_texture, _tex);
}