Extension-Druid/druid/materials/gui_repeat/gui_repeat.vp

#version 140

in mediump vec3 position;
in mediump vec2 texcoord0;
in lowp vec4 color;

uniform vertex_inputs
{
	highp mat4 view_proj;
	highp vec4 uv_coord;
	highp vec4 uv_repeat; // [repeat_x, repeat_y, pivot_x, pivot_y]
	vec4 uv_rotated;
	vec4 params; // [margin_x, margin_y, offset_x, offset_y]
	vec4 perspective; // [perspective_x, perspective_y, zoom, offset_y]
};

out mediump vec2 var_texcoord0;
out lowp vec4 var_color;
out highp vec4 var_uv;
out highp vec4 var_repeat;
out vec4 var_params;
out vec4 var_perspective;
out vec4 var_uv_rotated;

void main()
{
	var_texcoord0 = texcoord0;
	var_color = vec4(color.rgb * color.a, color.a);
	var_uv = uv_coord;
	var_repeat = uv_repeat;
	var_params = params;
	var_perspective = perspective;
	var_uv_rotated = uv_rotated;

	float perspective_y = position.z;

	float scale_x = 1.0 - abs(perspective.x);
	float scale_y = 1.0 - abs(perspective_y);

	mat4 transform = mat4(
		scale_x, 0, 0, perspective.z,
		0, scale_y, 0, perspective.w,
		0, 0, 1, 0,
		perspective.x, perspective_y, 0, 1.0
	);

	// Matrix Info = mat4(
	// scale_x,       skew_x,           0,             offset_x,
	// skew_y,        scale_y,          0,             offset_y,
	// 0,             0,                scale_z,       offset_z,
	// perspective_x, perspective_y,    perspective_z, zoom
	//)

	gl_Position = view_proj * vec4(position.xyz, 1.0) * transform;
}