void ssgVtxTableShadow::draw_geometry ()
{
int num_colours = getNumColours () ;
int num_normals = getNumNormals () ;
int num_vertices = getNumVertices () ;
int num_texcoords = getNumTexCoords () ;
sgVec3 *vx = (sgVec3 *) vertices -> get(0) ;
sgVec3 *nm = (sgVec3 *) normals -> get(0) ;
sgVec2 *tx = (sgVec2 *) texcoords -> get(0) ;
sgVec4 *cl = (sgVec4 *) colours -> get(0) ;
glDepthMask(GL_FALSE);
glPolygonOffset(-15.0f, -20.0f);
glEnable(GL_POLYGON_OFFSET_FILL);
//glEnable(GL_CULL_FACE);
glBegin ( gltype ) ;
if ( num_colours == 0 ) glColor4f ( 1.0f, 1.0f, 1.0f, 1.0f ) ;
if ( num_colours == 1 ) glColor4fv ( cl [ 0 ] ) ;
if ( num_normals == 1 ) glNormal3fv ( nm [ 0 ] ) ;
for ( int i = 0 ; i < num_vertices ; i++ )
{
if ( num_colours > 1 ) glColor4fv ( cl [ i ] ) ;
if ( num_normals > 1 ) glNormal3fv ( nm [ i ] ) ;
if ( num_texcoords > 1 ) glTexCoord2fv ( tx [ i ] ) ;
glVertex3fv ( vx [ i ] ) ;
}
glEnd () ;
glDisable(GL_POLYGON_OFFSET_FILL);
glDepthMask(GL_TRUE);
}
void ofxMesh::invertNormals() {
for (int i=0; i<getNumNormals(); i++) {
getNormals()[i] *= -1;
}
}
void ssgVtxTableSmoke::draw_geometry ()
{
int num_colours = getNumColours();
int num_normals = getNumNormals();
float alpha;
GLfloat modelView[16];
sgVec3 A, B, C, D;
sgVec3 right, up, offset;
sgVec3 *vx = (sgVec3 *) vertices->get(0);
sgVec3 *nm = (sgVec3 *) normals->get(0);
sgVec4 *cl = (sgVec4 *) colours->get(0);
alpha = 0.9f - ((float)(cur_life/max_life));
glDepthMask(GL_FALSE);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
/*glPolygonOffset(-5.0f, +10.0f);*/
/*glEnable(GL_POLYGON_OFFSET_FILL);*/
// the principle is to have a right and up vector
// to determine how the points of the quadri should be placed
// orthogonaly to the view, parallel to the screen.
/* get the matrix */
// TODO: replace that, glGet stalls rendering pipeline (forces flush).
glGetFloatv(GL_MODELVIEW_MATRIX, modelView);
// get the up and right vector from the matrice view
offset[0] = offset[1] = offset[2] = 0.0f;
int i;
for (i = 0; i < 3; i++) {
int j = i;
int k;
for (k = 0; k < 4; k++, j+=4) {
if (k != 3) {
offset[i] += modelView[j] * vx[0][k];
} else {
offset[i] += modelView[j];
}
}
}
//printf ("%f %f %f\n", offset[0], offset[1], offset[2]);
tdble dist = sqrt(offset[0]*offset[0]
+ offset[1]*offset[1]
+ offset[2]*offset[2]);
up[0] = modelView[1];
up[1] = modelView[5];
up[2] = modelView[9];
right[0] = modelView[0];
right[1] = modelView[4];
right[2] = modelView[8];
// compute the coordinates of the four points of the quadri.
// up and right points
C[0] = right[0]+up[0];
C[1] = right[1]+up[1];
C[2] = right[2]+up[2];
// left and up
D[0] = -right[0]+up[0];
D[1] = -right[1]+up[1];
D[2] = -right[2]+up[2];
// down and left
A[0] = -right[0]-up[0];
A[1] = -right[1]-up[1];
A[2] = -right[2]-up[2];
// right and down
B[0] = right[0]-up[0];
B[1] = right[1]-up[1];
B[2] = right[2]-up[2];
glBegin ( gltype ) ;
if (dist < 50.0f) {
alpha *= (1.0f - exp(-0.1f * dist));
}
glColor4f(cur_col[0],cur_col[1],cur_col[2],alpha);
if (num_colours == 1) {
glColor4fv(cl[0]);
}
if (num_normals == 1) {
glNormal3fv(nm[0]);
}
// the computed coordinates are translated from the smoke position with the x, y, z speed
glTexCoord2f(0,0);
glVertex3f(vx[0][0]+sizex*A[0],vx[0][1]+sizey*A[1], vx[0][2]+sizez*A[2]);
glTexCoord2f(0,1);
glVertex3f(vx[0][0]+sizex*B[0],vx[0][1]+sizey*B[1], vx[0][2]+sizez*B[2]);
glTexCoord2f(1,0);
glVertex3f(vx[0][0]+sizex*D[0],vx[0][1]+sizey*D[1], vx[0][2]+sizez*D[2]);
glTexCoord2f(1,1);
glVertex3f(vx[0][0]+sizex*C[0],vx[0][1]+sizey*C[1], vx[0][2]+sizez*C[2]);
glEnd();
glDisable(GL_POLYGON_OFFSET_FILL);
glDepthMask(GL_TRUE);
glTexEnvf(GL_TEXTURE_ENV,GL_TEXTURE_ENV_MODE,GL_MODULATE);
}
void ssgVtxTableCarlight::draw_geometry ()
{
if (on == 0) {
return;
}
int num_normals = getNumNormals();
float alpha;
GLfloat modelView[16];
sgVec3 A, B, C, D;
sgVec3 right, up;
sgVec3 axis;
sgMat4 mat;
sgMat4 mat3;
sgVec3 *vx = (sgVec3 *) vertices->get(0);
sgVec3 *nm = (sgVec3 *) normals->get(0);
alpha = 0.75f;
glDepthMask(GL_FALSE);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
glPolygonOffset(-15.0f, -20.0f);
glEnable(GL_POLYGON_OFFSET_FILL);
// get the matrix.
glGetFloatv(GL_MODELVIEW_MATRIX, modelView);
// get the up and right vector from the matrice view.
up[0] = modelView[1];
up[1] = modelView[5];
up[2] = modelView[9];
right[0] = modelView[0];
right[1] = modelView[4];
right[2] = modelView[8];
// compute the coordinates of the four points of the quadri.
// up and right points
C[0] = right[0] + up[0];
C[1] = right[1] + up[1];
C[2] = right[2] + up[2];
// left and up
D[0] = -right[0] + up[0];
D[1] = -right[1] + up[1];
D[2] = -right[2] + up[2];
// down and left
A[0] = -right[0] - up[0];
A[1] = -right[1] - up[1];
A[2] = -right[2] - up[2];
// right and down
B[0] = right[0] - up[0];
B[1] = right[1] - up[1];
B[2] = right[2] - up[2];
axis[0] = 0;
axis[1] = 0;
axis[2] = 1;
if (grMaxTextureUnits > 1) {
glActiveTextureARB (GL_TEXTURE0_ARB);
}
sgMakeRotMat4(mat, ((float)rand()/(float)RAND_MAX)*45, axis);
glMatrixMode(GL_TEXTURE);
glLoadIdentity ();
sgMakeTransMat4(mat3, 0.5, 0.5, 0);
glMultMatrixf((float *)mat3);
glMultMatrixf((float *)mat);
sgMakeTransMat4(mat3, -0.5, -0.5, 0);
glMultMatrixf((float *)mat3);
glMatrixMode(GL_MODELVIEW);
for (int I = 0; I < on; I++)
{
glBegin(gltype) ;
glColor4f(0.8, 0.8, 0.8, alpha);
if (num_normals == 1) {
glNormal3fv(nm[0]);
}
// the computed coordinates are translated from the smoke position with the x,y,z speed.
glTexCoord2f(0, 0);
glVertex3f(vx[0][0] + factor*size*A[0], vx[0][1] + factor*size*A[1], vx[0][2] + factor*size*A[2]);
glTexCoord2f(0, 1);
glVertex3f(vx[0][0] + factor*size*B[0], vx[0][1] + factor*size*B[1], vx[0][2] + factor*size*B[2]);
glTexCoord2f(1, 0);
glVertex3f(vx[0][0] + factor*size*D[0], vx[0][1] + factor*size*D[1], vx[0][2] + factor*size*D[2]);
glTexCoord2f(1, 1);
glVertex3f(vx[0][0]+factor*size*C[0],vx[0][1]+factor*size*C[1], vx[0][2]+factor*size*C[2]);
glEnd();
}
glDisable(GL_POLYGON_OFFSET_FILL);
if (grMaxTextureUnits > 1) {
glActiveTextureARB (GL_TEXTURE0_ARB);
}
glMatrixMode(GL_TEXTURE);
glLoadIdentity();
glMatrixMode(GL_MODELVIEW);
glDepthMask(GL_TRUE);
}