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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 <vector>
#include "Game/UI/CursorIcons.h"
#include "Rendering/GL/myGL.h"
class CLineDrawer {
public:
CLineDrawer();
~CLineDrawer() {};
void Configure(bool useColorRestarts, bool useRestartColor,
const float* restartColor, float restartAlpha);
void SetupLineStipple();
void UpdateLineStipple();
void StartPath(const float3& pos, const float* color);
void FinishPath() const;
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();
/// now same as restart
void RestartSameColor();
void RestartWithColor(const float* color);
const float3& GetLastPos() const { return lastPos; }
void DrawAll();
private:
bool lineStipple;
bool useColorRestarts;
bool useRestartColor;
float restartAlpha;
const float* restartColor;
float3 lastPos;
const float* lastColor;
float stippleTimer;
// queue all lines and draw them in one go later
struct LinePair {
GLenum type;
std::vector<GLfloat> verts;
std::vector<GLfloat> colors;
};
std::vector<LinePair> lines;
std::vector<LinePair> stippled;
};
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::FinishPath() const
{
// noop, left for compatibility
}
inline void CLineDrawer::Break(const float3& endPos, const float* color)
{
lastPos = endPos;
lastColor = color;
}
inline void CLineDrawer::Restart()
{
LinePair *ptr;
if (lineStipple) {
stippled.push_back(LinePair());
ptr = &stippled.back();
} else {
lines.push_back(LinePair());
ptr = &lines.back();
}
LinePair& p = *ptr;
if (!useColorRestarts) {
p.type = GL_LINE_STRIP;
p.colors.push_back(lastColor[0]);
p.colors.push_back(lastColor[1]);
p.colors.push_back(lastColor[2]);
p.colors.push_back(lastColor[3]);
p.verts.push_back(lastPos[0]);
p.verts.push_back(lastPos[1]);
p.verts.push_back(lastPos[2]);
} else {
p.type = GL_LINES;
}
}
inline void CLineDrawer::RestartWithColor(const float *color)
{
lastColor = color;
Restart();
}
inline void CLineDrawer::RestartSameColor()
{
// the only way for this to work would be using glGet AFAIK
// so it's left broken
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)
{
LinePair *ptr;
if (lineStipple) {
ptr = &stippled.back();
} else {
ptr = &lines.back();
}
LinePair& p = *ptr;
if (!useColorRestarts) {
p.colors.push_back(color[0]);
p.colors.push_back(color[1]);
p.colors.push_back(color[2]);
p.colors.push_back(color[3]);
p.verts.push_back(endPos.x);
p.verts.push_back(endPos.y);
p.verts.push_back(endPos.z);
} else {
if (useRestartColor) {
p.colors.push_back(restartColor[0]);
p.colors.push_back(restartColor[1]);
p.colors.push_back(restartColor[2]);
p.colors.push_back(restartColor[3]);
} else {
p.colors.push_back(color[0]);
p.colors.push_back(color[1]);
p.colors.push_back(color[2]);
p.colors.push_back(color[3] * restartAlpha);
}
p.verts.push_back(lastPos.x);
p.verts.push_back(lastPos.y);
p.verts.push_back(lastPos.z);
p.colors.push_back(color[0]);
p.colors.push_back(color[1]);
p.colors.push_back(color[2]);
p.colors.push_back(color[3]);
p.verts.push_back(endPos.x);
p.verts.push_back(endPos.y);
p.verts.push_back(endPos.z);
}
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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