• Announcements

    • khawk

      Download the Game Design and Indie Game Marketing Freebook   07/19/17

      GameDev.net and CRC Press have teamed up to bring a free ebook of content curated from top titles published by CRC Press. The freebook, Practices of Game Design & Indie Game Marketing, includes chapters from The Art of Game Design: A Book of Lenses, A Practical Guide to Indie Game Marketing, and An Architectural Approach to Level Design. The GameDev.net FreeBook is relevant to game designers, developers, and those interested in learning more about the challenges in game development. We know game development can be a tough discipline and business, so we picked several chapters from CRC Press titles that we thought would be of interest to you, the GameDev.net audience, in your journey to design, develop, and market your next game. The free ebook is available through CRC Press by clicking here. The Curated Books The Art of Game Design: A Book of Lenses, Second Edition, by Jesse Schell Presents 100+ sets of questions, or different lenses, for viewing a game’s design, encompassing diverse fields such as psychology, architecture, music, film, software engineering, theme park design, mathematics, anthropology, and more. Written by one of the world's top game designers, this book describes the deepest and most fundamental principles of game design, demonstrating how tactics used in board, card, and athletic games also work in video games. It provides practical instruction on creating world-class games that will be played again and again. View it here. A Practical Guide to Indie Game Marketing, by Joel Dreskin Marketing is an essential but too frequently overlooked or minimized component of the release plan for indie games. A Practical Guide to Indie Game Marketing provides you with the tools needed to build visibility and sell your indie games. With special focus on those developers with small budgets and limited staff and resources, this book is packed with tangible recommendations and techniques that you can put to use immediately. As a seasoned professional of the indie game arena, author Joel Dreskin gives you insight into practical, real-world experiences of marketing numerous successful games and also provides stories of the failures. View it here. An Architectural Approach to Level Design This is one of the first books to integrate architectural and spatial design theory with the field of level design. The book presents architectural techniques and theories for level designers to use in their own work. It connects architecture and level design in different ways that address the practical elements of how designers construct space and the experiential elements of how and why humans interact with this space. Throughout the text, readers learn skills for spatial layout, evoking emotion through gamespaces, and creating better levels through architectural theory. View it here. Learn more and download the ebook by clicking here. Did you know? GameDev.net and CRC Press also recently teamed up to bring GDNet+ Members up to a 20% discount on all CRC Press books. Learn more about this and other benefits here.
Sign in to follow this  
Followers 0
msantos

Lighting gets darker when texture is aplied

2 posts in this topic

Hi everyone.
I have this problem: I have a 3d scene and when I apply a texture to the floor the lighting gets darker. If I remove the texture the lights gets back to normal. I can't understand why because even the menu characters that are not affected by light get darker. It's weird because I only have this problem with some textures.

It seems like the darker the color of the texture is, the less light I have.
I tried to change glTexEnvf, I replaced GL_MODULATE and started to use GL_DECAL so the texture doesn't get affected by lights. It worked, the texture has its original color, but everything else gets white with no shapes (like a 3d object with lighting off)

here's my code

void LoadTexture(const char * bitmap_file)
{
glbmp_t bitmap;

if(!glbmp_LoadBitmap(bitmap_file, 0, &bitmap))
{
fprintf(stderr, "Error loading bitmap file: %s\n", bitmap_file);
exit(1);
}
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, texname);
glGenTextures(1, &texname);
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, bitmap.width, bitmap.height,
0, GL_RGB, GL_UNSIGNED_BYTE, bitmap.rgb_data);
glbmp_FreeBitmap(&bitmap);
}

then I apply the texture to a quad and load the image that I want as texture. Maybe I have something missing or I have some code in the wrong place. Does anybody know how to solve this problem?
0

Share this post


Link to post
Share on other sites
I assume you don't want everything to be textured. If that's the case, then probably you have forgotten to disable texturing for the non textured objects/triangles (openGL is a state system, that means whatever state you set, that will remain and affect things until you change the state. Texturing is a state too, so as the currently "applied"/bound texture image, so as the lastly set texture coordinates. So in your case, all the drawn primitives will have the color of your texture's corner multiplied by the light color).

GL_MODULATE should be fine, I'm not sure why the textured object appears poorly lit. Maybe you should post a "before-after" image about the issue (no texturing vs texturing and GL_MODULATE) Edited by szecs
1

Share this post


Link to post
Share on other sites
Yes you were right, I had forgotten to disable texturing in the non textured objects. I tried it before but I did it in the wrong place. Now everything is working fine. Thank you for you help :)
0

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  
Followers 0