source: ps/trunk/source/graphics/CinemaManager.cpp@ 25289

/* Copyright (C) 2021 Wildfire Games.
 * This file is part of 0 A.D.
 *
 * 0 A.D. is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2 of the License, or
 * (at your option) any later version.
 *
 * 0 A.D. is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with 0 A.D.  If not, see <http://www.gnu.org/licenses/>.
 */

#include "precompiled.h"

#include <sstream>
#include <string>

#include "graphics/CinemaManager.h"

#include "graphics/Camera.h"
#include "graphics/GameView.h"
#include "lib/ogl.h"
#include "maths/MathUtil.h"
#include "maths/Quaternion.h"
#include "maths/Vector3D.h"
#include "maths/Vector4D.h"
#include "ps/CLogger.h"
#include "ps/ConfigDB.h"
#include "ps/CStr.h"
#include "ps/Game.h"
#include "ps/GameSetup/Config.h"
#include "ps/Hotkey.h"
#include "ps/World.h"
#include "simulation2/components/ICmpCinemaManager.h"
#include "simulation2/components/ICmpOverlayRenderer.h"
#include "simulation2/components/ICmpRangeManager.h"
#include "simulation2/components/ICmpSelectable.h"
#include "simulation2/components/ICmpTerritoryManager.h"
#include "simulation2/MessageTypes.h"
#include "simulation2/system/ComponentManager.h"
#include "simulation2/Simulation2.h"
#include "renderer/Renderer.h"


CCinemaManager::CCinemaManager()
    : m_DrawPaths(false)
{
}

void CCinemaManager::Update(const float deltaRealTime) const
{
    CmpPtr<ICmpCinemaManager> cmpCinemaManager(g_Game->GetSimulation2()->GetSimContext().GetSystemEntity());
    if (!cmpCinemaManager)
        return;

    if (IsPlaying())
        cmpCinemaManager->PlayQueue(deltaRealTime, g_Game->GetView()->GetCamera());
}

void CCinemaManager::Render() const
{
    if (!IsEnabled() && m_DrawPaths)
        DrawPaths();
}

void CCinemaManager::DrawPaths() const
{
    CmpPtr<ICmpCinemaManager> cmpCinemaManager(g_Game->GetSimulation2()->GetSimContext().GetSystemEntity());
    if (!cmpCinemaManager)
        return;

    for (const std::pair<const CStrW, CCinemaPath>& p : cmpCinemaManager->GetPaths())
    {
        DrawSpline(p.second, CColor(0.2f, 0.2f, 1.f, 0.9f), 128, true);
        DrawNodes(p.second, CColor(0.1f, 1.f, 0.f, 1.f));

        if (p.second.GetTargetSpline().GetAllNodes().empty())
            continue;

        DrawSpline(p.second.GetTargetSpline(), CColor(1.f, 0.3f, 0.4f, 0.9f), 128, true);
        DrawNodes(p.second.GetTargetSpline(), CColor(1.f, 0.1f, 0.f, 1.f));
    }
}

void CCinemaManager::DrawSpline(const RNSpline& spline, const CColor& splineColor, int smoothness, bool lines) const
{
    if (spline.GetAllNodes().size() < 2)
        return;
    if (spline.GetAllNodes().size() == 2 && lines)
        smoothness = 2;

    float start = spline.MaxDistance.ToFloat() / smoothness;
    float time = 0;

#if CONFIG2_GLES
    #warning TODO : implement CCinemaPath on GLES
#else

    glDisable(GL_DEPTH_TEST);
    glEnable(GL_BLEND);
    glColor4f(splineColor.r, splineColor.g, splineColor.b, splineColor.a);
    if (lines)
    {
        glLineWidth(1.8f);
        glEnable(GL_LINE_SMOOTH);
        glBegin(GL_LINE_STRIP);
        for (int i = 0; i <= smoothness; ++i)
        {
            time = start * i / spline.MaxDistance.ToFloat();
            CVector3D tmp = spline.GetPosition(time);
            glVertex3f(tmp.X, tmp.Y, tmp.Z);
        }
        glEnd();

        // Height indicator
        if (g_Game && g_Game->GetWorld() && g_Game->GetWorld()->GetTerrain())
        {
            glLineWidth(1.1f);
            glBegin(GL_LINES);
            for (int i = 0; i <= smoothness; ++i)
            {
                time = start * i / spline.MaxDistance.ToFloat();
                CVector3D tmp = spline.GetPosition(time);
                float groundY = g_Game->GetWorld()->GetTerrain()->GetExactGroundLevel(tmp.X, tmp.Z);
                glVertex3f(tmp.X, tmp.Y, tmp.Z);
                glVertex3f(tmp.X, groundY, tmp.Z);
            }
            glEnd();
        }

        glDisable(GL_LINE_SMOOTH);
        glLineWidth(1.0f);
    }
    else
    {
        smoothness /= 2;
        start = spline.MaxDistance.ToFloat() / smoothness;
        glEnable(GL_POINT_SMOOTH);
        glPointSize(3.0f);
        glBegin(GL_POINTS);
        for (int i = 0; i <= smoothness; ++i)
        {
            time = start * i / spline.MaxDistance.ToFloat();
            CVector3D tmp = spline.GetPosition(time);
            glVertex3f(tmp.X, tmp.Y, tmp.Z);
        }
        glEnd();
        glPointSize(1.0f);
        glDisable(GL_POINT_SMOOTH);
    }
    glDisable(GL_BLEND);
    glEnable(GL_DEPTH_TEST);

#endif
}

void CCinemaManager::DrawNodes(const RNSpline& spline, const CColor& nodeColor) const
{
#if CONFIG2_GLES
    #warning TODO : implement CCinemaPath on GLES
#else

    glDisable(GL_DEPTH_TEST);
    glEnable(GL_POINT_SMOOTH);
    glPointSize(7.0f);
    glColor4f(nodeColor.r, nodeColor.g, nodeColor.b, nodeColor.a);
    glBegin(GL_POINTS);

    for (const SplineData& node : spline.GetAllNodes())
        glVertex3f(node.Position.X.ToFloat(), node.Position.Y.ToFloat(), node.Position.Z.ToFloat());

    glEnd();
    glPointSize(1.0f);
    glDisable(GL_POINT_SMOOTH);
    glEnable(GL_DEPTH_TEST);
#endif
}

bool CCinemaManager::IsEnabled() const
{
    CmpPtr<ICmpCinemaManager> cmpCinemaManager(g_Game->GetSimulation2()->GetSimContext().GetSystemEntity());
    return cmpCinemaManager && cmpCinemaManager->IsEnabled();
}

bool CCinemaManager::IsPlaying() const
{
    return IsEnabled() && g_Game && !g_Game->m_Paused;
}

bool CCinemaManager::GetPathsDrawing() const
{
    return m_DrawPaths;
}

void CCinemaManager::SetPathsDrawing(const bool drawPath)
{
    m_DrawPaths = drawPath;
}