for (int z = 0; z < MAP_Z-1; z++)
{
glBegin(GL_TRIANGLE_STRIP);
for (int x = 0; x < MAP_X-1; x++)
{
if (x==0 && z==0)
glTexCoord2f(0.0f, 0.0f);
glVertex3f(terrain[x][z][0], terrain[x][z][1], terrain[x][z][2]);
if (x==30 && z==0)
glTexCoord2f(1.0f, 0.0f);
glVertex3f(terrain[x+1][z][0], terrain[x+1][z][1], terrain[x+1][z][2]);
if (x==0 && z==30)
glTexCoord2f(0.0f, 1.0f);
glVertex3f(terrain[x][z+1][0], terrain[x][z+1][1], terrain[x][z+1][2]);
if (x==30 && z==30)
glTexCoord2f(1.0f, 1.0f);
glVertex3f(terrain[x+1][z+1][0], terrain[x+1][z+1][1], terrain[x+1][z+1][2]);
}
glEnd();
}
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one texture for terrain
May 31, 2002 01:12 PM
i wanna put one big bmp picture on my terrain, but the code doesnt work..why???
if i texture each triangle it looks nice...if i wanna put one big texture over the hole terrain it looks really weird
[edited by - schnegge on May 31, 2002 2:15:03 PM]
168
May 31, 2002 03:54 PM
Obviously it is going to look weird. Depending on the size of your terrain and the size of your texture, the texture may be streched across the terrain (leading to a loss of detail), or it is being streched in an odd proportion (i.e. not a square), so it may also be squished in one axis.
100
June 01, 2002 01:16 AM
maybe calculate tex coordinates for every poly. like doing a model. something like (MAPZ-1)/z except when z = 0, z==0 then texcoor = 0;
by the way, if you''re not using frustum culling or some other visibility check. use drawelements to render the terrain.
by the way, if you''re not using frustum culling or some other visibility check. use drawelements to render the terrain.
Game Core
June 01, 2002 09:29 AM
i have it now
i had to texture each polygon with a part of the big texture..
thx to all
i had to texture each polygon with a part of the big texture..
thx to all
June 02, 2002 04:50 PM
i changed now the code from the nehe tut. i can now use one texture for the whole map. unfortunaltely it dosnt work right. i wanna texture this pic:
and it looks like this:
why??
here is the code:
[edited by - schnegge on June 2, 2002 5:53:03 PM]
[edited by - schnegge on June 2, 2002 5:53:33 PM]
and it looks like this:
why??
here is the code:
float xTexture = 0.0f;float yTexture = 0.0f;for(y=1; y<heightMapHeight-1; y++){if(renderMode==RENDER_FILLED || renderMode==RENDER_TEXTURED) glBegin(GL_TRIANGLE_STRIP);if(renderMode==RENDER_WIRE) glBegin(GL_LINES); //Render the row as a triangle strip for(x=0; x<heightMapWidth-1; x++) { glTexCoord2f(xTexture, yTexture); glVertex3f(terrain[((y*heightMapHeight)+x)][0],terrain[((y*heightMapHeight)+x)][1],terrain[((y*heightMapHeight)+x)][2]); glTexCoord2f((xTexture + (1/heightMapWidth)), yTexture); glVertex3f(terrain[((y*heightMapHeight)+(x+1))][0],terrain[((y*heightMapHeight)+(x+1))][1],terrain[((y*heightMapHeight)+(x+1))][2]); glTexCoord2f(xTexture, (yTexture + (1/heightMapHeight))); glVertex3f(terrain[(((y+1)*heightMapHeight)+x)][0],terrain[(((y+1)*heightMapHeight)+x)][1],terrain[(((y+1)*heightMapHeight)+x)][2]); glTexCoord2f((xTexture + (1/heightMapWidth)),( yTexture + (1/heightMapHeight))); glVertex3f(terrain[(((y+1)*heightMapHeight)+(x+1))][0],terrain[(((y+1)*heightMapHeight)+(x+1))][1],terrain[(((y+1)*heightMapHeight)+(x+1))][2]); xTexture += (1.0f/heightMapWidth); }glEnd();xTexture = 0.0f;yTexture += (1.0f/heightMapHeight);} [edited by - schnegge on June 2, 2002 5:53:03 PM]
[edited by - schnegge on June 2, 2002 5:53:33 PM]
June 10, 2002 12:58 PM
and why does it texture each triangle and not each quad. i thought if i use trianglestrip i coud texture it like a quad...
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