RenderNames.hpp

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/*
 * Author: Sven Gothel <sgothel@jausoft.com> (C++, Java) and Rami Santina (Java)
 * Copyright Gothel Software e.K. and the authors
 *
 * SPDX-License-Identifier: MIT
 *
 * This Source Code Form is subject to the terms of the MIT License
 * If a copy of the MIT was not distributed with this file,
 * you can obtain one at https://opensource.org/license/mit/.
 */
#ifndef JAU_GAMP_GRAPH_GL_RENDERNAMES_HPP_
#define JAU_GAMP_GRAPH_GL_RENDERNAMES_HPP_
 
#include <string_view>
 
namespace gamp::graph::gl {
 
    /** \addtogroup Gamp_Graph
     *
     *  @{
     */
     
    class RenderNames {
      public:
        constexpr static std::string_view gcu_PMVMatrix = "gcu_PMVMatrix"; // mat4 gcu_PMVMatrix[4]; // P, Mv, Mvi and Mvit        
        constexpr static std::string_view gcu_StaticColor = "gcu_StaticColor"; // vec4        
        constexpr static std::string_view gcu_Weight = "gcu_Weight"; // float
        
        // USE_COLOR_TEXTURE:
        constexpr static std::string_view gcu_ColorTexUnit = "gcu_ColorTexUnit"; // FIXME
        constexpr static std::string_view gcu_ColorTexBBox = "gcu_ColorTexBBox"; // vec2 gcu_ColorTexBBox[3]; // box-min[2], box-max[2] and tex-size[2]
        constexpr static std::string_view gcu_ColorTexClearCol = "gcu_ColorTexClearCol"; // vec4: clear color for gcu_ColorTexBBox clipping
        // USE_FRUSTUM_CLIPPING:
        constexpr static std::string_view gcu_ClipFrustum = "gcu_ClipFrustum"; // vec4: L, R, B, T, N, F each {n.x, n.y, n.z, d}
        // USE_LIGHT0:
        constexpr static std::string_view gcu_LightPos = "gcu_LightPos"; // vec3
    
        // 2nd pass:
        constexpr static std::string_view gcu_PMVMatrix02 = "gcu_PMVMatrix02"; // mat4 gcu_PMVMatrix[4]; // P, Mv, Mvi, Mvit ???
        constexpr static std::string_view gcu_FboTexUnit = "gcu_FboTexUnit";   // sampler2D gcu_FboTexUnit
        constexpr static std::string_view gcu_FboTexSize = "gcu_FboTexSize";   // vec2
        
        /// The vertex attribute
        constexpr static std::string_view gca_Vertex = "gca_Vertex"; // vec4
    
        /**
         * Curve texture coord attribute
         *
         * CDTriangulator2D.extractBoundaryTriangles(..):
         *     AA line (exp)   : z > 0
         *     line            : x ==   0, y == 0
         *     hole or holeLike: 0 > y
         *     !hole           : 0 < y
         *
         *     0   == gca_CurveParam.x : vertex-0 of triangle
         *     0.5 == gca_CurveParam.x : vertex-1 of triangle
         *     1   == gca_CurveParam.x : vertex-2 of triangle
         */
        constexpr static std::string_view gca_CurveParam = "gca_CurveParam"; // vec3
    
        /// Color attribute (optional), USE_COLOR_CHANNEL:
        constexpr static std::string_view gca_Color = "gca_Color"; // vec4
    
        /// Normal attribute (optional), USE_NORMAL_CHANNEL:
        constexpr static std::string_view gca_Normal = "gca_Normal"; // vec3
        
        /// 2nd pass FBO vertex attribute (optional)
        constexpr static std::string_view gca_FboVertex = "gca_FboVertex"; // vec4
    
        /// 2nd pass FBO texture coordinate attribute (optional)
        constexpr static std::string_view gca_FboTexCoord = "gca_FboTexCoord"; // vec2
    };
    
    /**@}*/
 
} // namespace gamp::graph::gl
 
#endif // JAU_GAMP_GRAPH_GL_RENDERNAMES_HPP_