• Advertisement
  • Popular Tags

  • Popular Now

  • Advertisement
  • Similar Content

    • By fleissi
      Hey guys!

      I'm new here and I recently started developing my own rendering engine. It's open source, based on OpenGL/DirectX and C++.
      The full source code is hosted on github:
      https://github.com/fleissna/flyEngine

      I would appreciate if people with experience in game development / engine desgin could take a look at my source code. I'm looking for honest, constructive criticism on how to improve the engine.
      I'm currently writing my master's thesis in computer science and in the recent year I've gone through all the basics about graphics programming, learned DirectX and OpenGL, read some articles on Nvidia GPU Gems, read books and integrated some of this stuff step by step into the engine.

      I know about the basics, but I feel like there is some missing link that I didn't get yet to merge all those little pieces together.

      Features I have so far:
      - Dynamic shader generation based on material properties
      - Dynamic sorting of meshes to be renderd based on shader and material
      - Rendering large amounts of static meshes
      - Hierarchical culling (detail + view frustum)
      - Limited support for dynamic (i.e. moving) meshes
      - Normal, Parallax and Relief Mapping implementations
      - Wind animations based on vertex displacement
      - A very basic integration of the Bullet physics engine
      - Procedural Grass generation
      - Some post processing effects (Depth of Field, Light Volumes, Screen Space Reflections, God Rays)
      - Caching mechanisms for textures, shaders, materials and meshes

      Features I would like to have:
      - Global illumination methods
      - Scalable physics
      - Occlusion culling
      - A nice procedural terrain generator
      - Scripting
      - Level Editing
      - Sound system
      - Optimization techniques

      Books I have so far:
      - Real-Time Rendering Third Edition
      - 3D Game Programming with DirectX 11
      - Vulkan Cookbook (not started yet)

      I hope you guys can take a look at my source code and if you're really motivated, feel free to contribute :-)
      There are some videos on youtube that demonstrate some of the features:
      Procedural grass on the GPU
      Procedural Terrain Engine
      Quadtree detail and view frustum culling

      The long term goal is to turn this into a commercial game engine. I'm aware that this is a very ambitious goal, but I'm sure it's possible if you work hard for it.

      Bye,

      Phil
    • By tj8146
      I have attached my project in a .zip file if you wish to run it for yourself.
      I am making a simple 2d top-down game and I am trying to run my code to see if my window creation is working and to see if my timer is also working with it. Every time I run it though I get errors. And when I fix those errors, more come, then the same errors keep appearing. I end up just going round in circles.  Is there anyone who could help with this? 
       
      Errors when I build my code:
      1>Renderer.cpp 1>c:\users\documents\opengl\game\game\renderer.h(15): error C2039: 'string': is not a member of 'std' 1>c:\program files (x86)\windows kits\10\include\10.0.16299.0\ucrt\stddef.h(18): note: see declaration of 'std' 1>c:\users\documents\opengl\game\game\renderer.h(15): error C2061: syntax error: identifier 'string' 1>c:\users\documents\opengl\game\game\renderer.cpp(28): error C2511: 'bool Game::Rendering::initialize(int,int,bool,std::string)': overloaded member function not found in 'Game::Rendering' 1>c:\users\documents\opengl\game\game\renderer.h(9): note: see declaration of 'Game::Rendering' 1>c:\users\documents\opengl\game\game\renderer.cpp(35): error C2597: illegal reference to non-static member 'Game::Rendering::window' 1>c:\users\documents\opengl\game\game\renderer.cpp(36): error C2597: illegal reference to non-static member 'Game::Rendering::window' 1>c:\users\documents\opengl\game\game\renderer.cpp(43): error C2597: illegal reference to non-static member 'Game::Rendering::window' 1>Done building project "Game.vcxproj" -- FAILED. ========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========  
       
      Renderer.cpp
      #include <GL/glew.h> #include <GLFW/glfw3.h> #include "Renderer.h" #include "Timer.h" #include <iostream> namespace Game { GLFWwindow* window; /* Initialize the library */ Rendering::Rendering() { mClock = new Clock; } Rendering::~Rendering() { shutdown(); } bool Rendering::initialize(uint width, uint height, bool fullscreen, std::string window_title) { if (!glfwInit()) { return -1; } /* Create a windowed mode window and its OpenGL context */ window = glfwCreateWindow(640, 480, "Hello World", NULL, NULL); if (!window) { glfwTerminate(); return -1; } /* Make the window's context current */ glfwMakeContextCurrent(window); glViewport(0, 0, (GLsizei)width, (GLsizei)height); glOrtho(0, (GLsizei)width, (GLsizei)height, 0, 1, -1); glMatrixMode(GL_PROJECTION); glLoadIdentity(); glfwSwapInterval(1); glEnable(GL_SMOOTH); glEnable(GL_DEPTH_TEST); glEnable(GL_BLEND); glDepthFunc(GL_LEQUAL); glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST); glEnable(GL_TEXTURE_2D); glLoadIdentity(); return true; } bool Rendering::render() { /* Loop until the user closes the window */ if (!glfwWindowShouldClose(window)) return false; /* Render here */ mClock->reset(); glfwPollEvents(); if (mClock->step()) { glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glfwSwapBuffers(window); mClock->update(); } return true; } void Rendering::shutdown() { glfwDestroyWindow(window); glfwTerminate(); } GLFWwindow* Rendering::getCurrentWindow() { return window; } } Renderer.h
      #pragma once namespace Game { class Clock; class Rendering { public: Rendering(); ~Rendering(); bool initialize(uint width, uint height, bool fullscreen, std::string window_title = "Rendering window"); void shutdown(); bool render(); GLFWwindow* getCurrentWindow(); private: GLFWwindow * window; Clock* mClock; }; } Timer.cpp
      #include <GL/glew.h> #include <GLFW/glfw3.h> #include <time.h> #include "Timer.h" namespace Game { Clock::Clock() : mTicksPerSecond(50), mSkipTics(1000 / mTicksPerSecond), mMaxFrameSkip(10), mLoops(0) { mLastTick = tick(); } Clock::~Clock() { } bool Clock::step() { if (tick() > mLastTick && mLoops < mMaxFrameSkip) return true; return false; } void Clock::reset() { mLoops = 0; } void Clock::update() { mLastTick += mSkipTics; mLoops++; } clock_t Clock::tick() { return clock(); } } TImer.h
      #pragma once #include "Common.h" namespace Game { class Clock { public: Clock(); ~Clock(); void update(); bool step(); void reset(); clock_t tick(); private: uint mTicksPerSecond; ufloat mSkipTics; uint mMaxFrameSkip; uint mLoops; uint mLastTick; }; } Common.h
      #pragma once #include <cstdio> #include <cstdlib> #include <ctime> #include <cstring> #include <cmath> #include <iostream> namespace Game { typedef unsigned char uchar; typedef unsigned short ushort; typedef unsigned int uint; typedef unsigned long ulong; typedef float ufloat; }  
      Game.zip
    • By Ty Typhoon
      Before read everything i am honest:
      Payment after release you get your percentage lifetime for that project.
       
      Second:
      i dont need your inspirations, ideas, music or designs.
      My head is full with that.
      I need workers who i can trust.
       
       
       
      Please let us talk in discord.
      I got a lot of stuff planned, there is much work to do.
       
      But first my team and me try to start with a small mini game and we need maybe exactly you.
      Planned for more than pc, like ps4, xbox one and mobile - so its very important to us to hopefully welcome a programmer.
       
      The mini game will be part of the planned big game. There will be never before seen guns and gameplay, you will get deeper info if youre a safe part of the team.
       
      I need:
      Programmers
      Animators
      Zbrush pros
       
      Join here please:
      https://discord.gg/YtjE3sV
       
      You find me here:
      Joerg Federmann Composing#2898
       
       
    • By Ty Typhoon
      I like to build my A - Team now.
       
      I need loyal people who can trust and believe in a dream.
      If you got time and no need for direct pay please contact me now.
       
      We cant pay now, you will recieve a lifetime percentage if the released game will give earnings. 
      If I get the best people together for a team, everything should be possible.
       
       
      What i need:
      - Programmer c++
      - Unity / Unreal - we must check whats possible, please share your experience with me.
      - Sculpter, 3D Artist
      - Animator
      - Marketing / Promotion 
       
       
      What i do:
      - Studio Owner
      - Director
      - Recruit exactly you
      - Sounddesign
      - Main theme composing
      - Vocals
      - Game design
      - Gun, swords, shields and weapon design
      - Character, plants and animal design
       
       
      Please dont ask about the Name of the Game, about Designs or Screenshots.
      The game will be defintitly affected about our and your skills if you join the team.
       
       
      Planned for the big Game:
      - 1st person shooter
      - online multiplayer
      - character manipulation
      - complete big open world with like lifetime actions and reactions
      - gunstore with many items to buy
      - many upgrades for players
      - specials like mini games
       
      So if you are interested in joining a team with a nearly complete game idea, contact me now and tell me what you can do.
       
      discord:
      joerg federmann composing#2898
       
       
    • By codelyoko373
      I wasn't sure if this would be the right place for a topic like this so sorry if it isn't.
      I'm currently working on a project for Uni using FreeGLUT to make a simple solar system simulation. I've got to the point where I've implemented all the planets and have used a Scene Graph to link them all together. The issue I'm having with now though is basically the planets and moons orbit correctly at their own orbit speeds.
      I'm not really experienced with using matrices for stuff like this so It's likely why I can't figure out how exactly to get it working. This is where I'm applying the transformation matrices, as well as pushing and popping them. This is within the Render function that every planet including the sun and moons will have and run.
      if (tag != "Sun") { glRotatef(orbitAngle, orbitRotation.X, orbitRotation.Y, orbitRotation.Z); } glPushMatrix(); glTranslatef(position.X, position.Y, position.Z); glRotatef(rotationAngle, rotation.X, rotation.Y, rotation.Z); glScalef(scale.X, scale.Y, scale.Z); glDrawElements(GL_TRIANGLES, mesh->indiceCount, GL_UNSIGNED_SHORT, mesh->indices); if (tag != "Sun") { glPopMatrix(); } The "If(tag != "Sun")" parts are my attempts are getting the planets to orbit correctly though it likely isn't the way I'm meant to be doing it. So I was wondering if someone would be able to help me? As I really don't have an idea on what I would do to get it working. Using the if statement is truthfully the closest I've got to it working but there are still weird effects like the planets orbiting faster then they should depending on the number of planets actually be updated/rendered.
  • Advertisement
  • Advertisement
Sign in to follow this  

Steering Behavior Seeking code malfunction

Recommended Posts

I got some code that im tweaking. Ive almost got it to work. It doesn't seem to work right though. First when it first starts in my INIT function that I set to target 50,0,0, it jets off way to fast. Here is what im doing.

 

seek(IvVector3 target)
{

    IvVector3 desired = target - position;
    desired.Normalize();
    desired = desired * maxspeed;
    IvVector3 steer = desired - velocity;


    if(steer.LengthSquared() > maxforce * maxforce)
    {
        steer.Normalize();
        steer *= maxforce;
    }

    applyForce(steer);


}



   void applyForce(IvVector3 Force)
{

    acceleration = Force;


}

In my update Function

 

velocity += acceleration;

if(GetKeyState(0x31))
    {
        seek(IvVector3(0,0,50));
    }
 if(GetKeyState(0x32))
    {
        seek(IvVector3(-50,0,0));
    }



position += (velocity * mTimer.DeltaTime());
TESTS = XMMatrixTranslation(position.x,0,position.z);
// Reset acceleration to 0 each cycle
acceleration.IsZero();  

Also when it reaches the target, it completey stops instead of going back and forth

 

 

Share this post


Link to post
Share on other sites
Advertisement

This might not be precisely the problem, but it looks you're basing your homing/seeking on the current velocity of the object.  I think what you're really aiming to do (pun intended) is to separate the object's velocity vector from its heading.  In other words, I think your update should:

  • Look at the direction the object "wants" to go -- this is the desired direction you've calculated (it should be a normalized vector)
  • Look at the object's (missile or something?) current heading -- which direction is it presently facing?  (should also be a normalized vector)
  • Determine the angle between the two vectors; i.e., determine how to rotate the object to match the missile's heading to the desired vector (you'll probably need an angle and axis, as an angle of rotation is meaningless, if not also given an axis to rotate around)
  • Determine force/impulse to apply to the missile, to accomplish the desired rotation of its heading

Note:  The missile should always be thrusting -- traveling "forward" along its heading vector.  The goal of this algorithm is to determine how to change that heading.  Of course, in every frame, because the missile is moving, the "desired" vector will change, which will cause the rotational force/impulse to change, which will cause the missile's heading to change.  You'll probably be able (read: "need") to tweak a few parameters to get the seeking to behave the way you want.

A caveat: I've never written a homing/seeking missile before, so I could be somewhat off - but at a high level, I think your steps should look something like what I've described.

Another caveat: I gave my answer assuming you want to avoid the "dreaded quaternion".  Quats would probably make easy work of this problem, but I'm not sure what your comfort level is with that.

Have any experts in the community done something like this?

 

Share this post


Link to post
Share on other sites

You're not multiplying your acceleration value by dt.

 

Also, you may want to change applyForce to use += instead of = since you're probably going to want to apply more than one force at a time.

 

Are you reading Millington?

Edited by Khatharr

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

Sign in to follow this  

  • Advertisement