255 lines
9.1 KiB
C++
255 lines
9.1 KiB
C++
|
/*
|
|||
|
|
Simple example of RayCastWorld Pixel Game Engine Extension
|
|||
|
|
"My Kneeeeeeeees!!!!" - javidx9
|
|||
|
|
|
|||
|
|
License (OLC-3)
|
|||
|
|
~~~~~~~~~~~~~~~
|
|||
|
|
|
|||
|
|
Copyright 2018-2020 OneLoneCoder.com
|
|||
|
|
|
|||
|
|
Redistribution and use in source and binary forms, with or without
|
|||
|
|
modification, are permitted provided that the following conditions
|
|||
|
|
are met:
|
|||
|
|
|
|||
|
|
1. Redistributions or derivations of source code must retain the above
|
|||
|
|
copyright notice, this list of conditions and the following disclaimer.
|
|||
|
|
|
|||
|
|
2. Redistributions or derivative works in binary form must reproduce
|
|||
|
|
the above copyright notice. This list of conditions and the following
|
|||
|
|
disclaimer must be reproduced in the documentation and/or other
|
|||
|
|
materials provided with the distribution.
|
|||
|
|
|
|||
|
|
3. Neither the name of the copyright holder nor the names of its
|
|||
|
|
contributors may be used to endorse or promote products derived
|
|||
|
|
from this software without specific prior written permission.
|
|||
|
|
|
|||
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|||
|
|
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|||
|
|
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|||
|
|
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|||
|
|
HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|||
|
|
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|||
|
|
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|||
|
|
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|||
|
|
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|||
|
|
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|||
|
|
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|||
|
|
|
|||
|
|
Relevant Video: https://youtu.be/Vij_obgv9h4
|
|||
|
|
|
|||
|
|
Links
|
|||
|
|
~~~~~
|
|||
|
|
YouTube: https://www.youtube.com/javidx9
|
|||
|
|
https://www.youtube.com/javidx9extra
|
|||
|
|
Discord: https://discord.gg/WhwHUMV
|
|||
|
|
Twitter: https://www.twitter.com/javidx9
|
|||
|
|
Twitch: https://www.twitch.tv/javidx9
|
|||
|
|
GitHub: https://www.github.com/onelonecoder
|
|||
|
|
Patreon: https://www.patreon.com/javidx9
|
|||
|
|
Homepage: https://www.onelonecoder.com
|
|||
|
|
|
|||
|
|
Community Blog: https://community.onelonecoder.com
|
|||
|
|
|
|||
|
|
Author
|
|||
|
|
~~~~~~
|
|||
|
|
David Barr, aka javidx9, <EFBFBD>OneLoneCoder 2018, 2019, 2020
|
|||
|
|
*/
|
|||
|
|
|
|||
|
|
#define OLC_PGE_APPLICATION
|
|||
|
|
#include "olcPixelGameEngine.h"
|
|||
|
|
|
|||
|
|
#define OLC_PGEX_RAYCASTWORLD
|
|||
|
|
#include "olcPGEX_RayCastWorld.h"
|
|||
|
|
|
|||
|
|
// ADAPTOR CLASS - Override the RayCastWorld Engine and fill in the blanks!
|
|||
|
|
class ExampleGame : public olc::rcw::Engine
|
|||
|
|
{
|
|||
|
|
public:
|
|||
|
|
ExampleGame(const int screen_w, const int screen_h, const float fov)
|
|||
|
|
: olc::rcw::Engine(screen_w, screen_h, fov)
|
|||
|
|
{
|
|||
|
|
sMap =
|
|||
|
|
"################################################################"
|
|||
|
|
"#.........#....................##..............................#"
|
|||
|
|
"#.........#....................................................#"
|
|||
|
|
"#.........#....................................................#"
|
|||
|
|
"#.........#....................................................#"
|
|||
|
|
"#.........#############........................................#"
|
|||
|
|
"#...............#..............................................#"
|
|||
|
|
"#...............#..............................................#"
|
|||
|
|
"#...............#..............................................#"
|
|||
|
|
"#.....#..#..#...#..............................................#"
|
|||
|
|
"#...............#..............................................#"
|
|||
|
|
"#...............#..............................................#"
|
|||
|
|
"#.....#..#..#..................................................#"
|
|||
|
|
"#..............................................................#"
|
|||
|
|
"#..............................................................#"
|
|||
|
|
"#..............................................................#"
|
|||
|
|
"#..............................................................#"
|
|||
|
|
"#.....................######..#................................#"
|
|||
|
|
"#.....................#.......#................................#"
|
|||
|
|
"#....................##.###.###.........................#......#"
|
|||
|
|
"#....................##.....#........................##........#"
|
|||
|
|
"#....................##.#####........................##.#......#"
|
|||
|
|
"#....................#.#.......................................#"
|
|||
|
|
"#....................#..#...............................#......#"
|
|||
|
|
"#..............................................................#"
|
|||
|
|
"#..............................................................#"
|
|||
|
|
"#..............................................................#"
|
|||
|
|
"#..............................................................#"
|
|||
|
|
"#..............................##..............................#"
|
|||
|
|
"#..............................##..............................#"
|
|||
|
|
"#..............................##..............................#"
|
|||
|
|
"################################################################";
|
|||
|
|
|
|||
|
|
vWorldSize = { 64, 32 };
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
protected:
|
|||
|
|
// User implementation to retrieve appropriate graphics for scenery
|
|||
|
|
olc::Pixel SelectSceneryPixel(const int tile_x, const int tile_y, const olc::rcw::Engine::CellSide side, const float sample_x, const float sample_y, const float distance) override
|
|||
|
|
{
|
|||
|
|
olc::Pixel p;
|
|||
|
|
|
|||
|
|
// Choose appropriate colour
|
|||
|
|
switch (side)
|
|||
|
|
{
|
|||
|
|
case olc::rcw::Engine::CellSide::Top: // Location is "Sky"
|
|||
|
|
p = olc::CYAN;
|
|||
|
|
break;
|
|||
|
|
|
|||
|
|
case olc::rcw::Engine::CellSide::Bottom: // Location is "Ground"
|
|||
|
|
p = olc::DARK_GREEN;
|
|||
|
|
break;
|
|||
|
|
|
|||
|
|
default: // Location is "Wall"
|
|||
|
|
p = olc::WHITE;
|
|||
|
|
if (sample_x < 0.05f || sample_x > 0.95f || sample_y < 0.05f || sample_y > 0.95f)
|
|||
|
|
p = olc::BLACK;
|
|||
|
|
break;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// Apply directional lighting, by first creating a shadow scalar...
|
|||
|
|
float fShadow = 1.0f;
|
|||
|
|
switch (side)
|
|||
|
|
{
|
|||
|
|
case olc::rcw::Engine::CellSide::South: fShadow = 0.3f; break;
|
|||
|
|
case olc::rcw::Engine::CellSide::East: fShadow = 0.3f; break;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// ...also shade by distance...
|
|||
|
|
float fDistance = 1.0f - std::min(distance / 32.0f, 1.0f);
|
|||
|
|
|
|||
|
|
// ...and applying it to sampled pixel
|
|||
|
|
p.r = uint8_t(float(p.r) * fDistance);
|
|||
|
|
p.g = uint8_t(float(p.g) * fDistance);
|
|||
|
|
p.b = uint8_t(float(p.b) * fDistance);
|
|||
|
|
|
|||
|
|
return p;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// User implementation to retrieve if a particular tile is solid
|
|||
|
|
bool IsLocationSolid(const float tile_x, const float tile_y) override
|
|||
|
|
{
|
|||
|
|
if (int(tile_x) >= 0 && int(tile_x) < vWorldSize.x && int(tile_y) >= 0 && int(tile_y) < vWorldSize.y)
|
|||
|
|
return sMap[int(tile_y) * vWorldSize.x + int(tile_x)] == '#';
|
|||
|
|
else
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
|
|||
|
|
// NOTE! Objects are not used in this demonstration ===================
|
|||
|
|
|
|||
|
|
// User implementation to retrieve dimensions of an in game object
|
|||
|
|
float GetObjectWidth(const uint32_t id) override
|
|||
|
|
{ return 1; }
|
|||
|
|
|
|||
|
|
float GetObjectHeight(const uint32_t id) override
|
|||
|
|
{ return 1; }
|
|||
|
|
|
|||
|
|
// User implementation to retrieve appropriate graphics for objects
|
|||
|
|
olc::Pixel SelectObjectPixel(const uint32_t id, const float sample_x, const float sample_y, const float distance, const float angle) override
|
|||
|
|
{ return olc::BLACK; }
|
|||
|
|
|
|||
|
|
private:
|
|||
|
|
std::string sMap;
|
|||
|
|
olc::vi2d vWorldSize;
|
|||
|
|
};
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
class RayCastWorldDemo_SIMPLE : public olc::PixelGameEngine
|
|||
|
|
{
|
|||
|
|
public:
|
|||
|
|
RayCastWorldDemo_SIMPLE()
|
|||
|
|
{
|
|||
|
|
sAppName = "RayCastWorld - SIMPLE";
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
public:
|
|||
|
|
bool OnUserCreate() override
|
|||
|
|
{
|
|||
|
|
// Create game object
|
|||
|
|
pGame.reset(new ExampleGame(ScreenWidth(), ScreenHeight(), 3.14159f / 3.333f));
|
|||
|
|
|
|||
|
|
// Add an object "player"
|
|||
|
|
std::shared_ptr<olc::rcw::Object> player = std::make_shared<olc::rcw::Object>();
|
|||
|
|
player->pos = { 2.1f, 2.1f };
|
|||
|
|
player->bVisible = false;
|
|||
|
|
|
|||
|
|
// Insert into game world
|
|||
|
|
pGame->mapObjects.insert_or_assign(0, player);
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
bool OnUserUpdate(float fElapsedTime) override
|
|||
|
|
{
|
|||
|
|
// Handle User Input =================================================
|
|||
|
|
auto& player = pGame->mapObjects[0];
|
|||
|
|
|
|||
|
|
if (GetKey(olc::Key::A).bHeld) // Turn Left
|
|||
|
|
player->Turn(-fPlayerMoveSpeed * 0.1f * fElapsedTime);
|
|||
|
|
|
|||
|
|
if (GetKey(olc::Key::D).bHeld) // Turn Right
|
|||
|
|
player->Turn(+fPlayerMoveSpeed * 0.1f * fElapsedTime);
|
|||
|
|
|
|||
|
|
// Reset speed and velocity so player doesnt move if keys are not pressed
|
|||
|
|
player->Stop();
|
|||
|
|
|
|||
|
|
// Walk Forward
|
|||
|
|
if (GetKey(olc::Key::W).bHeld) player->Walk(+fPlayerMoveSpeed);
|
|||
|
|
// Walk Backwards
|
|||
|
|
if (GetKey(olc::Key::S).bHeld) player->Walk(-fPlayerMoveSpeed);
|
|||
|
|
// Strafe Right
|
|||
|
|
if (GetKey(olc::Key::E).bHeld) player->Strafe(+fPlayerMoveSpeed);
|
|||
|
|
// Strafe Left
|
|||
|
|
if (GetKey(olc::Key::Q).bHeld) player->Strafe(-fPlayerMoveSpeed);
|
|||
|
|
|
|||
|
|
// Update & Render World ==================================================
|
|||
|
|
|
|||
|
|
// Update ray cast world engine - this will move the player object
|
|||
|
|
pGame->Update(fElapsedTime);
|
|||
|
|
|
|||
|
|
// Link the camera to the play position
|
|||
|
|
pGame->SetCamera(player->pos, player->fHeading);
|
|||
|
|
|
|||
|
|
// Render the scene!
|
|||
|
|
pGame->Render();
|
|||
|
|
|
|||
|
|
// Draw the players position, cos why not?
|
|||
|
|
DrawString({ 10,10 }, player->pos.str(), olc::BLACK);
|
|||
|
|
return true;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
private:
|
|||
|
|
float fPlayerMoveSpeed = 16.0f;
|
|||
|
|
std::unique_ptr<ExampleGame> pGame = nullptr;
|
|||
|
|
};
|
|||
|
|
|
|||
|
|
int main()
|
|||
|
|
{
|
|||
|
|
RayCastWorldDemo_SIMPLE demo;
|
|||
|
|
if (demo.Construct(320, 240, 4, 4))
|
|||
|
|
demo.Start();
|
|||
|
|
return 0;
|
|||
|
|
}
|