void mu3(int x,int y,char po[24],int f)
{ int m,n;
static int i=0;
for(m=0;m<2;m++)
{
for(n=0;n<3;n++)
{
blackground z1(x,y,m,n,BACKGROUND_BLUE|BACKGROUND_INTENSITY|FOREGROUND_INTENSITY);
z1.display1();
if(f&&i<24)
{
po[i++]=x+m; // x
po[i++]=y+n; // y
po[i++]=2; // 颜色
}
}
}
for(n=0,m=0;m<2;m++)
{
blackground z10(x+2,y+1,m,n,BACKGROUND_BLUE|BACKGROUND_INTENSITY|FOREGROUND_INTENSITY);
z10.display1();
if(f&&i<24)
{
po[i++]=x+m+2; // x
po[i++]=y+n+1; // y
po[i++]=2; // 颜色
}
}
}
void CreateHeightFieldMesh (NewtonCollision* collision, Entity* ent)
{
int width;
int height;
dFloat hScale;
dFloat vScale;
unsigned short* elevations;
NewtonCollisionInfoRecord collisionInfo;
// keep the compiler happy
memset (&collisionInfo, 0, sizeof (NewtonCollisionInfoRecord));
NewtonCollisionGetInfo (collision, &collisionInfo);
// get the info from the collision mesh and create a visual mesh
width = collisionInfo.m_heightField.m_width;
height = collisionInfo.m_heightField.m_height;
elevations = collisionInfo.m_heightField.m_elevation;
vScale = collisionInfo.m_heightField.m_verticalScale;
hScale = collisionInfo.m_heightField.m_horizonalScale;
// allocate space to store vertex data
ent->m_vertexCount = width * height;
ent->m_vertex = (dFloat*) malloc (3 * width * height * sizeof (dFloat));
ent->m_normal = (dFloat*) malloc (3 * width * height * sizeof (dFloat));
ent->m_uv = (dFloat*) malloc (2 * width * height * sizeof (dFloat));
// scan the height field and convert every cell into two triangles
for (int z = 0; z < height; z ++) {
int z0;
int z1;
z0 = ((z - 1) < 0) ? 0 : z - 1;
z1 = ((z + 1) > (height - 1)) ? height - 1 : z + 1 ;
for (int x = 0; x < width; x ++) {
int x0;
int x1;
x0 = ((x - 1) < 0) ? 0 : x - 1;
x1 = ((x + 1) > (width - 1)) ? width - 1 : x + 1 ;
dVector p0 (hScale * x0, elevations[z * width + x1] * vScale, hScale * z);
dVector p1 (hScale * x1, elevations[z * width + x0] * vScale, hScale * z);
dVector x10 (p1 - p0);
dVector q0 (hScale * x, elevations[z0 * width + x] * vScale, hScale * z0);
dVector q1 (hScale * x, elevations[z1 * width + x] * vScale, hScale * z1);
dVector z10 (q1 - q0);
dVector normal (z10 * x10);
normal = normal.Scale (dSqrt (1.0f / (normal % normal)));
dVector point (hScale * x, elevations[z * width + x] * vScale, hScale * z);
ent->m_vertex[(z * width + x) * 3 + 0] = point.m_x;
ent->m_vertex[(z * width + x) * 3 + 1] = point.m_y;
ent->m_vertex[(z * width + x) * 3 + 2] = point.m_z;
ent->m_normal[(z * width + x) * 3 + 0] = normal.m_x;
ent->m_normal[(z * width + x) * 3 + 1] = normal.m_y;
ent->m_normal[(z * width + x) * 3 + 2] = normal.m_z;
ent->m_uv[(z * width + x) * 2 + 0] = x * TEXTURE_SCALE;
ent->m_uv[(z * width + x) * 2 + 1] = z * TEXTURE_SCALE;
}
}
// since the bitmap sample is 256 x 256, i fix into a single 16 bit index vertex array with
ent->m_subMeshCount = 1;
ent->m_subMeshes = (Entity::SubMesh*) malloc (sizeof (Entity::SubMesh));
// allocate space to the index list
ent->m_subMeshes[0].m_textureHandle = LoadTexture ("grassAndDirt.tga");
ent->m_subMeshes[0].m_indexCount = (width - 1) * (height - 1) * 6;
ent->m_subMeshes[0].m_indexArray = (unsigned short*) malloc (ent->m_subMeshes[0].m_indexCount * sizeof (unsigned short));
// now following the grid pattern and create and index list
int index;
int vertexIndex;
index = 0;
vertexIndex = 0;
for (int z = 0; z < height - 1; z ++) {
vertexIndex = z * width;
for (int x = 0; x < width - 1; x ++) {
ent->m_subMeshes[0].m_indexArray[index + 0] = GLushort (vertexIndex);
ent->m_subMeshes[0].m_indexArray[index + 1] = GLushort (vertexIndex + width);
ent->m_subMeshes[0].m_indexArray[index + 2] = GLushort (vertexIndex + 1);
index += 3;
ent->m_subMeshes[0].m_indexArray[index + 0] = GLushort (vertexIndex + 1);
ent->m_subMeshes[0].m_indexArray[index + 1] = GLushort (vertexIndex + width);
ent->m_subMeshes[0].m_indexArray[index + 2] = GLushort (vertexIndex + width + 1);
index += 3;
vertexIndex ++;
}
}
// Optimize the mesh for hardware rendering if possible
ent->OptimizeMesh();
/*
dVector boxP0;
dVector boxP1;
// get the position of the aabb of this geometry
dMatrix matrix (ent->m_curRotation, ent->m_curPosition);
NewtonCollisionCalculateAABB (collision, &matrix[0][0], &boxP0.m_x, &boxP1.m_x);
// place the origin of the visual mesh at the center of the height field
matrix.m_posit = (boxP0 + boxP1).Scale (-0.5f);
matrix.m_posit.m_w = 1.0f;
ent->m_curPosition = matrix.m_posit;
ent->m_prevPosition = matrix.m_posit;
// create the level rigid body
body = NewtonCreateBody(world, collision);
// release the collision tree (this way the application does not have to do book keeping of Newton objects
NewtonReleaseCollision (world, collision);
// save the pointer to the graphic object with the body.
NewtonBodySetUserData (body, ent);
// set the global position of this body
NewtonBodySetMatrix (body, &matrix[0][0]);
// set the destructor for this object
// NewtonBodySetDestructorCallback (body, Destructor);
// get the position of the aabb of this geometry
NewtonCollisionCalculateAABB (collision, &matrix[0][0], &boxP0.m_x, &boxP1.m_x);
// add some extra padding the world size
boxP0.m_x -= 10.0f;
boxP0.m_y -= 10.0f;
boxP0.m_z -= 10.0f;
boxP1.m_x += 10.0f;
boxP1.m_y += 400.0f;
boxP1.m_z += 10.0f;
// set the world size
NewtonSetWorldSize (world, &boxP0.m_x, &boxP1.m_x);
return body;
*/
}
