void Terrain::setNormalsBezier()
{
Vector3 v1, v2, v3, v4;
int indexW, indexH;
for(int h = 0; h < (height/PORTION) - 4; h += 3){
for(int w = 0; w < (width/PORTION) - 4; w += 3){
BezierPatch p = BezierPatch(coords[w][h], coords[w+1][h], coords[w+2][h], coords[w+3][h],
coords[w][h+1], coords[w+1][h+1], coords[w+2][h+1], coords[w+3][h+1],
coords[w][h+2], coords[w+1][h+2], coords[w+2][h+2], coords[w+3][h+2],
coords[w][h+3], coords[w+1][h+3], coords[w+2][h+3], coords[w+3][h+3]);
for(float u = 0.0; u <= 1.0 - BEZ_ACC; u += BEZ_ACC)
{
for(float v = 0.0; v <= 1.0 - BEZ_ACC; v += BEZ_ACC)
{
v1 = p.getPoint(u, v);
v2 = p.getPoint(u, v+1);
v3 = p.getPoint(u+1, v);
v4 = p.getPoint(u+1, v+1);
indexW = w + (int)(BEZ_POINTS*u);
indexH = h + (int)(BEZ_POINTS*v);
normal_bezier[indexW][indexH] = (v2-v1).cross(v3-v1).normalize();
normal_bezier[indexW][indexH+1] = (v3-v4).cross(v2-v4).normalize();
}
}
}
}
}
BezierSurfaceModel::BezierSurfaceModel(const QString& fileName)
{
QFile file(fileName);
if (file.open(QIODevice::ReadOnly))
{
QTextStream stream(&file);
int nPatches;
stream >> nPatches;
for (int i = 0; i < nPatches; i++)
{
int n = 0;
int m = 0;
stream >> n >> m;
if (n != SURFACE_ORDER || m != SURFACE_ORDER)
{
patches.clear();
return;
}
patches.append(BezierPatch());
for (int j = 0; j < m + 1; j++)
{
for (int k = 0; k < n + 1; k++)
{
float x, y, z;
stream >> x >> y >> z;
patches[i].controlPoints(j, k) = QVector3D(x, y, z);
}
}
}
}
void Terrain::drawBezier(Matrix4 c)
{
//glDisable(GL_LIGHTING);
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glMultMatrixf(c.ptr());
// Globals::shader->bind();
// GLint loc = glGetUniformLocationARB(Globals::shader->getPid(), "water_level");
// glUniform1f(loc, Shader::water_level);
// // GLint col = glGetAttribLocationARB(Globals::shader->getPid(), "gl_Color");
// GLint bandLoc = glGetUniformLocationARB(Globals::shader->getPid(), "band_width");
// glUniform1f(bandLoc, Shader::band_width);
// glDisable(GL_LIGHTING);
int indexW, indexH;
for(int h = 0; h < (height/PORTION) - 4; h += 3){
for(int w = 0; w < (width/PORTION) - 4; w += 3){
BezierPatch p = BezierPatch(coords[w][h], coords[w+1][h], coords[w+2][h], coords[w+3][h],
coords[w][h+1], coords[w+1][h+1], coords[w+2][h+1], coords[w+3][h+1],
coords[w][h+2], coords[w+1][h+2], coords[w+2][h+2], coords[w+3][h+2],
coords[w][h+3], coords[w+1][h+3], coords[w+2][h+3], coords[w+3][h+3]);
for(float u = 0.0; u <= 1.0 - BEZ_ACC; u += BEZ_ACC)
{
glBegin(GL_TRIANGLE_STRIP);
for(float v = 0.0; v <= 1.0; v += BEZ_ACC)
{
glColor3f(terrain_color[0], terrain_color[1], terrain_color[2]);
glVertex3fv(p.getPoint(u, v).ptr());
glVertex3fv(p.getPoint(u + BEZ_ACC, v).ptr());
indexW = w + (int)(BEZ_POINTS*u);
indexH = h + (int)(BEZ_POINTS*v);
glNormal3fv(normal_bezier[indexW][indexH+1].ptr());
}
glEnd();
}
}
}
//Globals::shader->unbind();
glPopMatrix();
//glEnable(GL_LIGHTING);
}
