Texturing height map problems
Post: #1
Hello
i am doing texturing for my height maps and well i did it so it would take the height and depending on the height give it a different texture so if its less then 150 then grass over than then rock.
I do if statements to draw the specific things so if its <150 then heighttex = 2; which means its gass and if its >150 then heighttex = 3; which means rock. so i do that and then i draw in the if statement.
Then in my drawglscene i have the glbindtexture with heighttex in there and then renderheightmap so it draws.
the problems is that its only Texturing what the 1st heighttex says so it would be 2, it isnt switching from textures.
Here is my Code:
So please someone help me out. THanks, Nahid
i am doing texturing for my height maps and well i did it so it would take the height and depending on the height give it a different texture so if its less then 150 then grass over than then rock.
I do if statements to draw the specific things so if its <150 then heighttex = 2; which means its gass and if its >150 then heighttex = 3; which means rock. so i do that and then i draw in the if statement.
Then in my drawglscene i have the glbindtexture with heighttex in there and then renderheightmap so it draws.
the problems is that its only Texturing what the 1st heighttex says so it would be 2, it isnt switching from textures.
Here is my Code:
PHP Code:
#define MAP_SIZE 1024
#define STEP_SIZE 16
#define HEIGHT_RATIO 0.5f
quad mapquad [MAP_SIZE*MAP_SIZE];
int heighttex;
int n =0;
void RenderHeightMap(GLubyte pHeightMap[])
{
int X = 0, Y = 0; int x, y, z; // Create Some Variables For Readability
if(!pHeightMap) return; // Make Sure Our Height Data Is Valid
if(bRender) // What We Want To Render
glBegin( GL_QUADS ); else
glBegin( GL_LINES );
for ( X = 0; X < (MAP_SIZE-STEP_SIZE); X += STEP_SIZE )
for ( Y = 0; Y < (MAP_SIZE-STEP_SIZE); Y += STEP_SIZE )
{
// Get The (X, Y, Z) Value For The Bottom Left Vertex
mapquad[n].x1 = X; mapquad[n].y1 = Height(pHeightMap, X, Y );
mapquad[n].z1 = Y;
// Get The (X, Y, Z) Value For The Top Left Vertex
mapquad[n].x2 = X; mapquad[n].y2 = Height(pHeightMap, X, Y + STEP_SIZE );
mapquad[n].z2 = Y + STEP_SIZE ;
// Get The (X, Y, Z) Value For The Top Right Vertex
mapquad[n].x3 = X + STEP_SIZE;
mapquad[n].y3 = Height(pHeightMap, X + STEP_SIZE, Y + STEP_SIZE );
mapquad[n].z3 = Y + STEP_SIZE ;
mapquad[n].x4 = X + STEP_SIZE;
mapquad[n].y4 = Height(pHeightMap, X + STEP_SIZE, Y );
mapquad[n].z4 = Y;
if (mapquad[n].y1 > 140 && mapquad[n].y2 > 140 &&
mapquad[n].y3 >140 && mapquad[n].y4 > 140 )
{
heighttex = 2;
glTexCoord2f(0.0, 0.0);
glVertex3i(mapquad[n].x1, mapquad[n].y1, mapquad[n].z1);
glTexCoord2f(0.0, 1.0);
glVertex3i(mapquad[n].x2, mapquad[n].y2, mapquad[n].z2);
glTexCoord2f(1.0, 1.0);
glVertex3i(mapquad[n].x3, mapquad[n].y3, mapquad[n].z3);
glTexCoord2f(1.0, 0.0);
glVertex3i(mapquad[n].x4, mapquad[n].y4, mapquad[n].z4);
}
if (mapquad[n].y1 < 141 && mapquad[n].y2< 141 && mapquad[n].y3< 141 && mapquad[n].y4< 141 )
{
heighttex = 3;
glTexCoord2f(0.0, 0.0);
glVertex3i(mapquad[n].x1, mapquad[n].y1, mapquad[n].z1);
glTexCoord2f(0.0, 1.0);
glVertex3i(mapquad[n].x2, mapquad[n].y2, mapquad[n].z2);
glTexCoord2f(1.0, 1.0);
glVertex3i(mapquad[n].x3, mapquad[n].y3, mapquad[n].z3);
glTexCoord2f(1.0, 0.0);
glVertex3i(mapquad[n].x4, mapquad[n].y4, mapquad[n].z4);
}
}
glEnd();
n++;
}
IN THE DRAWGLSCENE I HAVE:
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, texName[heighttex]);
glTranslatef(0.0f, -300.0f, 0.0f);
glScalef(1*2, 1*2, 1*2);
RenderHeightMap(g_HeightMap);
glDisable(GL_TEXTURE_2D);
So please someone help me out. THanks, Nahid
Post: #2
Could you please stick that in proper code or php tags so there is formatting? (Go back an edit your post)
I bet you'd get better help.
-Jon
I bet you'd get better help.
-Jon
Post: #4
You need to bind the textures inside the if statements. It looks like your binding one texture before you draw your entire height map.
so after you assign heighttex, do glBindTexture(GL_TEXTURE_2D, heighttex);
so after you assign heighttex, do glBindTexture(GL_TEXTURE_2D, heighttex);
There was a long silence...
'I claim them all,' said the Savage at last.
Possibly Related Threads...
| Thread: | Author | Replies: | Views: | Last Post | |
| Finding the height of a point on a given list of vertexes? | mikey | 10 | 4,353 |
Jan 4, 2010 05:36 AM Last Post: mikey |
|
| Height Map Loader, problem | nahid | 25 | 7,437 |
Oct 12, 2005 07:52 AM Last Post: nahid |
|
| Trouble Calculating Height Field Normals | Nick | 15 | 5,419 |
Jul 21, 2005 07:27 AM Last Post: Nick |
|