~vladh/peony: src/debugdraw.hpp - sourcehut git


                                                                                
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/*
  Peony Game Engine
  Copyright (C) 2020 Vlad-Stefan Harbuz <vlad@vladh.net>
  All rights reserved.
*/

#pragma once

#include "spatial.hpp"
#include "shaders.hpp"
#include "types.hpp"

namespace debugdraw {
  constexpr uint32 MAX_N_VERTICES = 2048;
  constexpr uint32 VERTEX_LENGTH = 7;
  constexpr size_t VERTEX_SIZE = sizeof(real32) * VERTEX_LENGTH;

  struct DebugDrawVertex {
    v3 position;
    v4 color;
  };

  struct DebugDrawState {
    shaders::Asset shader_asset;
    uint32 vao;
    uint32 vbo;
    DebugDrawVertex vertices[MAX_N_VERTICES];
    uint32 n_vertices_pushed;
  };

  extern DebugDrawState *g_dds;

  void draw_line(
    DebugDrawState *debug_draw_state,
    v3 start_pos,
    v3 end_pos,
    v4 color
  );
  void draw_ray(
    DebugDrawState *debug_draw_state,
    Ray *ray,
    real32 length,
    v4 color
  );
  void draw_quad(
    DebugDrawState *debug_draw_state,
    v3 p1, // clockwise: top left
    v3 p2, // top right
    v3 p3, // bottom right
    v3 p4, // bottom left
    v4 color
  );
  void draw_box(
    DebugDrawState *debug_draw_state,
    v3 p1, // clockwise top face: top left
    v3 p2, // top right
    v3 p3, // bottom right
    v3 p4, // top left
    v3 p5, // clockwise bottom face: top left
    v3 p6, // top right
    v3 p7, // bottom right
    v3 p8, // top left
    v4 color
  );
  void draw_obb(
    DebugDrawState *debug_draw_state,
    Obb *obb,
    v4 color
  );
  void draw_point(
    DebugDrawState *debug_draw_state,
    v3 position,
    real32 size,
    v4 color
  );
  void clear(DebugDrawState *debug_draw_state);
  void render(DebugDrawState *debug_draw_state);
  void init(
    DebugDrawState* debug_draw_state,
    MemoryPool *memory_pool
  );
}

using debugdraw::DebugDrawVertex, debugdraw::DebugDrawState;