//
// Simple passthrough vertex shader
//
attribute vec3 in_Position;                  // (x,y,z)
//attribute vec3 in_Normal;                  // (x,y,z)     unused in this shader.
attribute vec4 in_Colour;                    // (r,g,b,a)
attribute vec2 in_TextureCoord;              // (u,v)

varying vec2 v_vTexcoord;
varying vec4 v_vColour;

void main()
{
    vec4 object_space_pos = vec4( in_Position.x, in_Position.y, in_Position.z, 1.0);
    gl_Position = gm_Matrices[MATRIX_WORLD_VIEW_PROJECTION] * object_space_pos;
    
    v_vColour = in_Colour;
    v_vTexcoord = in_TextureCoord;
}

//######################_==_YOYO_SHADER_MARKER_==_######################@~
//
// Simple passthrough fragment shader
//
varying vec2 v_vTexcoord;
varying vec4 v_vColour;

uniform vec2  dimension;
uniform float scale;
uniform int   axis;
uniform int   shift;

void main() {
	gl_FragColor = texture2D( gm_BaseTexture, v_vTexcoord );
	if(gl_FragColor.a == 0.) return;
	
	vec2  pos  = v_vTexcoord * dimension;
	float prog = axis == 0? pos.x : pos.y;
	prog -= float(shift);
	prog /= scale;
	
	prog = prog - floor(prog / 2.) * 2.;
	if(prog >= 1.) gl_FragColor = v_vColour;
}