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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#ifndef _LINE_DRAWER_H
#define _LINE_DRAWER_H
#include <array>
#include <vector>
#include <array>
#include "Game/UI/CursorIcons.h"
#include "Rendering/GL/VertexArrayTypes.h"
#include "System/Color.h"
class CLineDrawer {
public:
CLineDrawer() {
for (size_t i = 0; i < regularLines.size(); i++) {
regularLines[i].reserve(64);
stippleLines[i].reserve(64);
}
}
enum LineWidth {
Default = 0,
QueuedCmd = 1
};
void Configure(
bool useColorRestarts,
bool useRestartColor,
const float* restartColor,
float restartAlpha
);
void SetWidth(LineWidth w) { width = w; }
void DrawAll(bool onMiniMap);
void SetupLineStipple();
void UpdateLineStipple();
void StartPath(const float3& pos, const float* color);
void DrawLine(const float3& endPos, const float* color);
void DrawLineAndIcon(int cmdID, const float3& endPos, const float* color);
void DrawIconAtLastPos(int cmdID);
void Break(const float3& endPos, const float* color);
void Restart();
/// same as restart; only way for this to work would be using glGet so it's left broken
void RestartSameColor() { Restart(); }
void RestartWithColor(const float* color);
const float3& GetLastPos() const { return lastPos; }
bool HaveRegularLines() const { for (auto& v: regularLines) { if (!v.empty()) return true; } return false; }
bool HaveStippleLines() const { for (auto& v: stippleLines) { if (!v.empty()) return true; } return false; }
private:
bool lineStipple = false;
bool useColorRestarts = false;
bool useRestartColor = false;
float restartAlpha = 0.0f;
float stippleTimer = 0.0f;
LineWidth width = Default;
float3 lastPos;
const float* restartColor = nullptr;
const float* lastColor = nullptr;
typedef std::vector<VA_TYPE_C> Line;
// queue all lines and draw them in one go later
// even := GL_LINE_LOOP, odd := GL_LINES (useColorRestarts)
// width:
// [0,1] := 1.0f or 2.5f on minimap
// [2,3] := cmdColors.QueuedLineWidth() or 2.5f on minimap
std::array<std::vector<Line>, 4> regularLines;
std::array<std::vector<Line>, 4> stippleLines;
};
extern CLineDrawer lineDrawer;
/******************************************************************************/
//
// Inlines
//
inline void CLineDrawer::Configure(bool ucr, bool urc, const float* rc, float ra)
{
restartAlpha = ra;
restartColor = rc;
useRestartColor = urc;
useColorRestarts = ucr;
}
inline void CLineDrawer::Break(const float3& endPos, const float* color)
{
lastPos = endPos;
lastColor = color;
}
inline void CLineDrawer::RestartWithColor(const float *color)
{
lastColor = color;
Restart();
}
inline void CLineDrawer::StartPath(const float3& pos, const float* color)
{
lastPos = pos;
lastColor = color;
Restart();
}
inline void CLineDrawer::DrawLine(const float3& endPos, const float* color)
{
const int idx = width * 2 + useColorRestarts;
Line& line = (lineStipple)? stippleLines[idx].back(): regularLines[idx].back();
if (!useColorRestarts) {
line.push_back({endPos, color});
} else {
line.push_back({lastPos, useRestartColor? restartColor: SColor{color[0], color[1], color[2], color[3] * restartAlpha}});
line.push_back({endPos, color});
}
lastPos = endPos;
lastColor = color;
}
inline void CLineDrawer::DrawLineAndIcon(int cmdID, const float3& endPos, const float* color)
{
cursorIcons.AddIcon(cmdID, endPos);
DrawLine(endPos, color);
}
inline void CLineDrawer::DrawIconAtLastPos(int cmdID)
{
cursorIcons.AddIcon(cmdID, lastPos);
}
#endif // _LINE_DRAWER_H
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