I have been working on this for a while and I can't seem to fix it. I have to images to show you guys: 1 - the rendered heightmap, 2 - the data loaded draw as an image where black is 0 height and bright red is max height. Also, when you look at the 2D and 3D heightmap, that back wall shouldn't be there, I don't know why thats happening.
It seems that the data saved in a byte array is not working so good. I don't know what is causing this so I hope you guys can find it out. Here's the terrain loading/rendering code...
BOOL cTerrain :: LoadRawFile(std::string strName, int nSize, int ID, std::string TexBase, std::string TexDetail, int MapX, int MapY)
{
FILE *pFile = NULL;
// Let's open the file in Read/Binary mode.
pFile = fopen( strName.c_str(), "rb" );
// Check to see if we found the file and could open it
if ( pFile == NULL )
{
// Display our error message and stop the function
MessageBox(HWND_DESKTOP, "Can't find the height map!", "Map Error", MB_OK);
Write("Can't find height map " + strName);
return FALSE;
}
TERRAIN tmpTerrain;
terrain.push_back(tmpTerrain);
TerrainCount += 1;
terrain[TerrainCount - 1].HeightMap = new BYTE[MAP_SIZE * MAP_SIZE];
terrain[TerrainCount - 1].MAPSIZE = nSize;
terrain[TerrainCount - 1].ID = ID;
terrain[TerrainCount - 1].TexBase = TexBase;
terrain[TerrainCount - 1].TexDetail = TexDetail;
terrain[TerrainCount - 1].x = MapX;
terrain[TerrainCount - 1].y = MapY;
// Here we load the .raw file into our pHeightMap data array.
// We are only reading in '1', and the size is the (width * height)
fread( terrain[TerrainCount - 1].HeightMap, 1, (MAP_SIZE * MAP_SIZE), pFile );
// After we read the data, it's a good idea to check if everything read fine.
int result = ferror( pFile );
// Check if we received an error.
if (result)
{
Write("Error loading terrain " + strName);
MessageBox(NULL, "Can't get data!", "Map Error", MB_OK);
}
Write("Loaded terrain " + strName);
if(!bmp.FindTexture(TexBase))
{
bmp.LoadGLTextures(TexBase,3);
}
if(!bmp.FindTexture(TexDetail))
{
bmp.LoadGLTextures(TexDetail,3);
}
terrain[TerrainCount - 1].MapList = glGenLists(1);
glNewList(terrain[TerrainCount - 1].MapList,GL_COMPILE);
glEnable(GL_FOG);
int X = terrain[TerrainCount - 1].x, Y = terrain[TerrainCount - 1].y; // Create some variables to walk the array with.
int x, y, z; // Create some variables for readability
bool bSwitchSides = false;
BYTE *pHeightMap;
pHeightMap = terrain[TerrainCount - 1].HeightMap;
// Activate the first texture ID and bind the tree background to it
glActiveTextureARB(GL_TEXTURE0_ARB);
glEnable(GL_TEXTURE_2D);
if(bmp.FindTexture(terrain[TerrainCount - 1].TexBase))
{
glBindTexture(GL_TEXTURE_2D, bmp.Texture(terrain[TerrainCount - 1].TexBase));
}
// Activate the second texture ID and bind the fog texture to it
glActiveTextureARB(GL_TEXTURE1_ARB);
glEnable(GL_TEXTURE_2D);
// Here we turn on the COMBINE properties and increase our RGB
// gamma for the detail texture. 2 seems to work just right.
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE_ARB);
glTexEnvi(GL_TEXTURE_ENV, GL_RGB_SCALE_ARB, 2);
// Bind the detail texture
if(bmp.FindTexture(terrain[TerrainCount - 1].TexDetail))
{
glBindTexture(GL_TEXTURE_2D, bmp.Texture(terrain[TerrainCount - 1].TexDetail));
}
// Now we want to enter the texture matrix. This will allow us
// to change the tiling of the detail texture.
glMatrixMode(GL_TEXTURE);
// Reset the current matrix and apply our chosen scale value
glLoadIdentity();
glScalef((float)4, (float)4, 1);
// Leave the texture matrix and set us back in the model view matrix
glMatrixMode(GL_MODELVIEW);
glBegin(GL_TRIANGLE_STRIP);
for (int x = terrain[TerrainCount - 1].x; x < MAP_SIZE + terrain[TerrainCount - 1].x; x += STEP_SIZE)
{
for (int y = terrain[TerrainCount - 1].y; y < MAP_SIZE + terrain[TerrainCount - 1].y; y += STEP_SIZE)
{
SetTextureCoord( (float)x, (float)y, TerrainCount - 1 );
glVertex3f(x,Height(pHeightMap, x, y, TerrainCount - 1 ),y);
SetTextureCoord( (float)x + STEP_SIZE, (float)y, TerrainCount - 1 );
glVertex3f(x + STEP_SIZE,Height(pHeightMap, x+ STEP_SIZE, y, TerrainCount - 1 ),y);
SetTextureCoord( (float)x, (float)y + STEP_SIZE, TerrainCount - 1 );
glVertex3f(x,Height(pHeightMap, x, y+ STEP_SIZE, TerrainCount - 1 ),y + STEP_SIZE);
SetTextureCoord( (float)x + STEP_SIZE, (float)y, TerrainCount - 1 );
glVertex3f(x + STEP_SIZE,Height(pHeightMap, x+ STEP_SIZE, y, TerrainCount - 1 ),y);
SetTextureCoord( (float)x + STEP_SIZE, (float)y + STEP_SIZE, TerrainCount - 1 );
glVertex3f(x + STEP_SIZE,Height(pHeightMap, x+ STEP_SIZE, y+ STEP_SIZE, TerrainCount - 1 ),y + STEP_SIZE);
SetTextureCoord( (float)x, (float)y + STEP_SIZE, TerrainCount - 1 );
glVertex3f(x,Height(pHeightMap, x, y+ STEP_SIZE, TerrainCount - 1 ),y + STEP_SIZE);
}
}
glEnd();
// Turn the second multitexture pass off
glActiveTextureARB(GL_TEXTURE1_ARB);
glDisable(GL_TEXTURE_2D);
// Turn the first multitexture pass off
glActiveTextureARB(GL_TEXTURE0_ARB);
glDisable(GL_TEXTURE_2D);
glDisable(GL_FOG);
glEndList();
pHeightMap = NULL;
// Close the file.
fclose(pFile);
return TRUE;
}
Here is my map, which draws a 2d version of the heightmap...
MapList = glGenLists(1);
glNewList(MapList, GL_COMPILE);
BYTE *pHeightMap;
pHeightMap = cTer.terrain.HeightMap;
glDisable(GL_TEXTURE_2D);
glBegin(GL_QUADS);
for (int x = 0; x < MAP_SIZE; x += 16)
{
for (int y = 0; y < MAP_SIZE; y += 16)
{
glColor3ub(cTer.Height(pHeightMap, x, y, i ),0,0);
glVertex2f(x,y);
glColor3ub(cTer.Height(pHeightMap, x, y + 16, i ),0,0);
glVertex2f(x, y + 16);
glColor3ub(cTer.Height(pHeightMap, x + 16, y + 16, i ),0,0);
glVertex2f(x + 16, y + 16);
glColor3ub(cTer.Height(pHeightMap, x + 16, y, i ),0,0);
glVertex2f(x + 16, y);
}
}
glEnd();
glEnable(GL_TEXTURE_2D);
glEndList();
Anyone know why this might be happening?
Jake
[Edited by - jake_Ghost on June 28, 2005 11:35:03 AM]
