//-----------------------------------------------------------------------
// -----------------------------------------------------------------------
// file="InternalResource"
// Project: StgSharp
// AuthorGroup: Nitload
// Copyright (c) Nitload. All rights reserved.
//     
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
//     
// -----------------------------------------------------------------------
// -----------------------------------------------------------------------
using System;
using System.Collections.Generic;
using System.Text;

namespace StgSharp.Internal
{
    internal static class BuiltInShader
    {

        #region ControllingItemRender

        internal const string ControlItemRenderVertexShader = """
            


            """;

        #endregion

        #region CollisionTexture

        internal static ReadOnlySpan<byte> CollisionTextureVertexShader => """
            #version 430 core
            layout(location = 0) in vec2 localCollisionCoord;
            layout(location = 1) in vec2 spaceCoord;
            layout(location = 2) in float rotation;
            layout(location = 3) in float scaling;
            
            uniform vec2 target;
            uniform mat2 projection;
            
            void main()
            {
                mat2 scaling = mat2(
                scaling,0,
                0,scaling );

                mat2 rotation = mat2(
                cos(rotation),-sin(rotation),
                sin(rotation),cos(rotation) );

                vec2 realCoord = (rotation * scaling * localCollisionCoord) + spaceCoord - target;
                realCoord = projection * realCoord;
                float dist = distance(realCoord, vec2(0,0));
                float angle = atan(realCoord.y, realCoord.x);
                gl_Position = vec4(angle, realCoord.y, dist, 1);
            }
            """u8;

        internal static ReadOnlySpan<byte> CollisionTextureFragmentShader => """
            #version 430 core
            out vec4 Color;
            
            uniform float range;
            void main()
            {
                float dist = gl_FragCoord.z;
                if(dist > range)
                {
                    discard;
                }
                dist /= range;
                gl_FragDepth = min(dist, gl_FragDepth);
                Color = vec4(dist,0,0,1);
            }
            """u8;

    #endregion
    }
}