The value of z is 0. The overal structure for that part of the program is as follows

BOOL DisplayScene()
{
static float waterHeight = 154.0f; // height of water
static bool waterDir = true; // used to animate water; true = up, false = down

float radians = float(PI*(g_angle-90.0f)/180.0f);

// calculate the camera's position
g_cameraPos[0] = g_lookAt[0] + (float)sin(radians) * g_mouseY; // multiplying by mouseY makes the
g_cameraPos[2] = g_lookAt[2] + (float)cos(radians) * g_mouseY; // camera get closer/farther away with mouseY
g_cameraPos[1] = g_lookAt[1] + g_mouseY / 2.0f;

// calculate the camera look-at coordinates as the center of the terrain map
g_lookAt[0] = (MAP_X*MAP_SCALE)/2.0f;
g_lookAt[1] = 150.0f;
g_lookAt[2] = -(MAP_Z*MAP_SCALE)/2.0f;

// clear screen and depth buffer
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glLoadIdentity();

// set the camera position
gluLookAt(g_cameraPos[0], g_cameraPos[1], g_cameraPos[2],
g_lookAt[0], g_lookAt[1], g_lookAt[2],
0.0, 1.0, 0.0);

// set the current texture to the land texture
glBindTexture(GL_TEXTURE_2D, g_land);

// loop through all the triangle strips
for (int z = 0; z < MAP_Z-1; z++)
{
//MessageBox(NULL,"Couldnt Draw Terrain.","TERRAIN ERROR",MB_OK | MB_ICONINFORMATION);
// draw the triangles in this strip
glDrawElements(GL_TRIANGLE_STRIP, MAP_X * 2, GL_UNSIGNED_INT, &g_indexArray[z * MAP_X * 2]);
MessageBox(NULL,"Couldnt Draw Terrain.","TERRAIN ERROR",MB_OK | MB_ICONINFORMATION);
}

// enable blending
glEnable(GL_BLEND);

// enable read-only depth buffer
glDepthMask(GL_FALSE);

// set the blend function to what we use for transparency
glBlendFunc(GL_SRC_ALPHA, GL_ONE);

glColor4f(0.5f, 0.5f, 1.0f, 0.7f); // set color to a transparent blue
glBindTexture(GL_TEXTURE_2D, g_water); // set texture to the water texture

// draw water as one large quad surface
glBegin(GL_QUADS);
glTexCoord2f(0.0f, 0.0f); // lower left corner
glVertex3f(g_terrain[0][0], waterHeight, g_terrain[0][2]);

glTexCoord2f(10.0f, 0.0f); // lower right corner
glVertex3f(g_terrain[MAP_X-1][0], waterHeight, g_terrain[MAP_X-1][2]);

glTexCoord2f(10.0f, 10.0f); // upper right corner
glVertex3f(g_terrain[MAP_X-1 + MAP_X * (MAP_Z-1)][0], waterHeight, g_terrain[MAP_X-1 + MAP_X * (MAP_Z-1)][2]);

glTexCoord2f(0.0f, 10.0f); // upper left corner
glVertex3f(g_terrain[MAP_X * (MAP_Z-1)][0], waterHeight, g_terrain[MAP_X * (MAP_Z-1)][2]);
glEnd();

// set back to normal depth buffer mode (writable)
glDepthMask(GL_TRUE);

// disable blending
glDisable(GL_BLEND);

// animate the water
if (waterHeight > 155.0f)
waterDir = false;
else if (waterHeight < 154.0f)
waterDir = true;

if (waterDir)
waterHeight += 0.01f;
else
waterHeight -= 0.01f;

return TRUE;
} // end DisplayScene()

Sorry bout that code dump. I really appreciate your guy's help.

Edited by - executor_2k2 on January 27, 2002 10:26:04 PM

Ok guys I just got an email reply from Dave Astle on the issue.
Here it is from the horse''s mouth:

Okay, I just ran both programs on my computer (I''m using 2000) and I got
the crashes too. The only thing that''s changed about my system since I
wrote those programs is my video card drivers, so NVIDIA must have
changed something. I was able to get the programs to work by removing
the lines:

if (glLockArraysEXT)
glLockArraysEXT(0, MAP_X * MAP_Z * 6);

and

// if the compiled arrays extension is available, unlock the arrays
if (glUnlockArraysEXT)
glUnlockArraysEXT();

I''m not sure why these are causing the crash, so I''ll have to do some
digging. It''s possible that I wasn''t using them correctly.

Dave

Thought i''d ease your guy''s minds and post the solution for future reference.

and that folks is an example of bollux memory

in nvidia drivers youll get a message like so
(NVOGLNT.DLL): 0xC0000005: Access Violation

it often happens if u forget something like
glEnableClientState( colour );
glEnableClientState(vertices );
glVertexPointer(..)
glDrawElements(....)

wheres the colour data pointer?

http://uk.geocities.com/sloppyturds/gotterdammerung.html