• Advertisement

Archived

This topic is now archived and is closed to further replies.

OpenGL OpenGL vs. DirectX

This topic is 5845 days old which is more than the 365 day threshold we allow for new replies. Please post a new topic.

If you intended to correct an error in the post then please contact us.

Recommended Posts

I know its probally been asked a billion times, but which do you think is better? Which is easier to learn? Which is most used? Thanks

Share this post


Link to post
Share on other sites
Advertisement
firstly, find the nearest window, open it, and fling yourself through it.
or if you prefer to be dramatic, leave the window closed.
please SEARCH the freaking forums before asking this TIRED question AGAIN.
almost every single time this topic comes up it turnes into a freaking lame ass debate.


-eldee
;another space monkey;
[ Forced Evolution Studios ]


Vash says: eat more donuts, play more games!

Share this post


Link to post
Share on other sites
Actaully I did, My main point was which one is easier to learn, and I didn''t see that in any of the previous discussions.

Share this post


Link to post
Share on other sites
quote:
Original post by eldee
firstly, find the nearest window, open it, and fling yourself through it.
or if you prefer to be dramatic, leave the window closed.
please SEARCH the freaking forums before asking this TIRED question AGAIN.



I''d say go for the flinging yourself through the window (closed) option.

Make a random number generator. If you get an even, learn DirectX. Odd, OpenGL.

Its as simple as that. If you can''t make a random number generator, you''re not ready for an API.

------------------------------
Simple DirectMedia Layer:

Main Site - (www.libsdl.org)
Cone3D Tutorials- (cone3D.gamedev.net)
GameDev.net''s Tutorials - (Here)

OpenGL:

Main Site - (www.opengl.org)
NeHe Tutorials - (nehe.gamedev.net)
Online Books - (Red Book) (Blue Book)

Share this post


Link to post
Share on other sites
quote:
Original post by Andrew Nguyen
Better, yet, jump throught the glass instead. Or mabye we can go over to your house and rip your body to shreds.

I think that was implied by the "window closed" option.

Share this post


Link to post
Share on other sites
Really though, in a couple of days there''s going to be a good article about it. When it comes out, you can decide.

------------------------------
Simple DirectMedia Layer:

Main Site - (www.libsdl.org)
Cone3D Tutorials- (cone3D.gamedev.net)
GameDev.net''s Tutorials - (Here)

OpenGL:

Main Site - (www.opengl.org)
NeHe Tutorials - (nehe.gamedev.net)
Online Books - (Red Book) (Blue Book)

Share this post


Link to post
Share on other sites
quote:
Original post by CtrlAltDel
Actaully I did, My main point was which one is easier to learn, and I didn''t see that in any of the previous discussions.


OpenGL is easier : no COM stuff and several wrapper libraries (e.g. GLUT) to take care of the windowing for you.

Share this post


Link to post
Share on other sites
Here is a few of the previous debates on this topic. Maybe this will answer your question.

http://www.gamedev.net/community/forums/topic.asp?topic_id=70736
http://www.gamedev.net/community/forums/topic.asp?topic_id=51612
http://www.gamedev.net/community/forums/topic.asp?topic_id=41610
http://www.gamedev.net/community/forums/topic.asp?topic_id=33732
http://www.gamedev.net/community/forums/topic.asp?topic_id=23313
http://www.gamedev.net/community/forums/topic.asp?topic_id=16371
http://www.gamedev.net/community/forums/topic.asp?topic_id=14358
http://www.gamedev.net/community/forums/topic.asp?topic_id=18187
http://www.gamedev.net/community/forums/topic.asp?topic_id=69298
http://www.gamedev.net/community/forums/topic.asp?topic_id=68555
http://www.gamedev.net/community/forums/topic.asp?topic_id=68362
http://www.gamedev.net/community/forums/topic.asp?topic_id=67101
http://www.gamedev.net/community/forums/topic.asp?topic_id=66775
http://www.gamedev.net/community/forums/topic.asp?topic_id=65166
http://www.gamedev.net/community/forums/topic.asp?topic_id=62875
http://www.gamedev.net/community/forums/topic.asp?topic_id=62373
http://www.gamedev.net/community/forums/topic.asp?topic_id=61258
http://www.gamedev.net/community/forums/topic.asp?topic_id=59551
http://www.gamedev.net/community/forums/topic.asp?topic_id=55468
http://www.gamedev.net/community/forums/topic.asp?topic_id=50671
http://www.gamedev.net/community/forums/topic.asp?topic_id=49972
http://www.gamedev.net/community/forums/topic.asp?topic_id=48101
http://www.gamedev.net/community/forums/topic.asp?topic_id=47986
http://www.gamedev.net/community/forums/topic.asp?topic_id=47679
http://www.gamedev.net/community/forums/topic.asp?topic_id=46038
http://www.gamedev.net/community/forums/topic.asp?topic_id=45782
http://www.gamedev.net/community/forums/topic.asp?topic_id=44371
http://www.gamedev.net/community/forums/topic.asp?topic_id=44131
http://www.gamedev.net/community/forums/topic.asp?topic_id=42463
http://www.gamedev.net/community/forums/topic.asp?topic_id=41580

Anyway I didnt make it 1/3 the way down the search result page and this is what I found. If you are not sure how to use search I am sure someone will explain it. By the way I searched all forums and used the keywords "direcx opengl" and I only pulled the topics with the same name as yours. Good luck

GRELLIN
Don''t sit and complain about a program, make a better one or shut up!

Share this post


Link to post
Share on other sites

This topic is 5845 days old which is more than the 365 day threshold we allow for new replies. Please post a new topic.

If you intended to correct an error in the post then please contact us.

Guest
This topic is now closed to further replies.

  • Advertisement
  • Advertisement
  • Popular Tags

  • Advertisement
  • Popular Now

  • Similar Content

    • By LifeArtist
      Good Evening,
      I want to make a 2D game which involves displaying some debug information. Especially for collision, enemy sights and so on ...
      First of I was thinking about all those shapes which I need will need for debugging purposes: circles, rectangles, lines, polygons.
      I am really stucked right now because of the fundamental question:
      Where do I store my vertices positions for each line (object)? Currently I am not using a model matrix because I am using orthographic projection and set the final position within the VBO. That means that if I add a new line I would have to expand the "points" array and re-upload (recall glBufferData) it every time. The other method would be to use a model matrix and a fixed vbo for a line but it would be also messy to exactly create a line from (0,0) to (100,20) calculating the rotation and scale to make it fit.
      If I proceed with option 1 "updating the array each frame" I was thinking of having 4 draw calls every frame for the lines vao, polygons vao and so on. 
      In addition to that I am planning to use some sort of ECS based architecture. So the other question would be:
      Should I treat those debug objects as entities/components?
      For me it would make sense to treat them as entities but that's creates a new issue with the previous array approach because it would have for example a transform and render component. A special render component for debug objects (no texture etc) ... For me the transform component is also just a matrix but how would I then define a line?
      Treating them as components would'nt be a good idea in my eyes because then I would always need an entity. Well entity is just an id !? So maybe its a component?
      Regards,
      LifeArtist
    • By QQemka
      Hello. I am coding a small thingy in my spare time. All i want to achieve is to load a heightmap (as the lowest possible walking terrain), some static meshes (elements of the environment) and a dynamic character (meaning i can move, collide with heightmap/static meshes and hold a varying item in a hand ). Got a bunch of questions, or rather problems i can't find solution to myself. Nearly all are deal with graphics/gpu, not the coding part. My c++ is on high enough level.
      Let's go:
      Heightmap - i obviously want it to be textured, size is hardcoded to 256x256 squares. I can't have one huge texture stretched over entire terrain cause every pixel would be enormous. Thats why i decided to use 2 specified textures. First will be a tileset consisting of 16 square tiles (u v range from 0 to 0.25 for first tile and so on) and second a 256x256 buffer with 0-15 value representing index of the tile from tileset for every heigtmap square. Problem is, how do i blend the edges nicely and make some computationally cheap changes so its not obvious there are only 16 tiles? Is it possible to generate such terrain with some existing program?
      Collisions - i want to use bounding sphere and aabb. But should i store them for a model or entity instance? Meaning i have 20 same trees spawned using the same tree model, but every entity got its own transformation (position, scale etc). Storing collision component per instance grats faster access + is precalculated and transformed (takes additional memory, but who cares?), so i stick with this, right? What should i do if object is dynamically rotated? The aabb is no longer aligned and calculating per vertex min/max everytime object rotates/scales is pretty expensive, right?
      Drawing aabb - problem similar to above (storing aabb data per instance or model). This time in my opinion per model is enough since every instance also does not have own vertex buffer but uses the shared one (so 20 trees share reference to one tree model). So rendering aabb is about taking the model's aabb, transforming with instance matrix and voila. What about aabb vertex buffer (this is more of a cosmetic question, just curious, bumped onto it in time of writing this). Is it better to make it as 8 points and index buffer (12 lines), or only 2 vertices with min/max x/y/z and having the shaders dynamically generate 6 other vertices and draw the box? Or maybe there should be just ONE 1x1x1 cube box template moved/scaled per entity?
      What if one model got a diffuse texture and a normal map, and other has only diffuse? Should i pass some bool flag to shader with that info, or just assume that my game supports only diffuse maps without fancy stuff?
      There were several more but i forgot/solved them at time of writing
      Thanks in advance
    • By RenanRR
      Hi All,
      I'm reading the tutorials from learnOpengl site (nice site) and I'm having a question on the camera (https://learnopengl.com/Getting-started/Camera).
      I always saw the camera being manipulated with the lookat, but in tutorial I saw the camera being changed through the MVP arrays, which do not seem to be camera, but rather the scene that changes:
      Vertex Shader:
      #version 330 core layout (location = 0) in vec3 aPos; layout (location = 1) in vec2 aTexCoord; out vec2 TexCoord; uniform mat4 model; uniform mat4 view; uniform mat4 projection; void main() { gl_Position = projection * view * model * vec4(aPos, 1.0f); TexCoord = vec2(aTexCoord.x, aTexCoord.y); } then, the matrix manipulated:
      ..... glm::mat4 projection = glm::perspective(glm::radians(fov), (float)SCR_WIDTH / (float)SCR_HEIGHT, 0.1f, 100.0f); ourShader.setMat4("projection", projection); .... glm::mat4 view = glm::lookAt(cameraPos, cameraPos + cameraFront, cameraUp); ourShader.setMat4("view", view); .... model = glm::rotate(model, glm::radians(angle), glm::vec3(1.0f, 0.3f, 0.5f)); ourShader.setMat4("model", model);  
      So, some doubts:
      - Why use it like that?
      - Is it okay to manipulate the camera that way?
      -in this way, are not the vertex's positions that changes instead of the camera?
      - I need to pass MVP to all shaders of object in my scenes ?
       
      What it seems, is that the camera stands still and the scenery that changes...
      it's right?
       
       
      Thank you
       
    • By dpadam450
      Sampling a floating point texture where the alpha channel holds 4-bytes of packed data into the float. I don't know how to cast the raw memory to treat it as an integer so I can perform bit-shifting operations.

      int rgbValue = int(textureSample.w);//4 bytes of data packed as color
      // algorithm might not be correct and endianness might need switching.
      vec3 extractedData = vec3(  rgbValue & 0xFF000000,  (rgbValue << 8) & 0xFF000000, (rgbValue << 16) & 0xFF000000);
      extractedData /= 255.0f;
    • By Devashish Khandelwal
      While writing a simple renderer using OpenGL, I faced an issue with the glGetUniformLocation function. For some reason, the location is coming to be -1.
      Anyone has any idea .. what should I do?
  • Advertisement