void draw_s2warpstereo(CAMERA cam) {
/* draw the left view directly; draw the right view to a texture
* then onto the screen using a warp */
// 1. create the texture if required.
if (!_s2w_textureready) {
if (_s2w_warpstereo_txt >= 0) {
ss2dt(_s2w_warpstereo_txt);
}
int tmp = mWINWIDTH - 1;
_s2w_warpstereo_w = 1;
while (tmp) {
tmp >>= 1;
_s2w_warpstereo_w <<= 1;
}
tmp = mWINHEIGHT - 1;
_s2w_warpstereo_h = 1;
while (tmp) {
tmp >>= 1;
_s2w_warpstereo_h <<= 1;
}
_s2w_warpstereo_txt = ss2ctt(_s2w_warpstereo_w, _s2w_warpstereo_h);
}
#define H_DIVISOR 2
// 2. draw the right and save a texture of it
glDrawBuffer(GL_BACK);
glReadBuffer(GL_BACK);
glViewport(0, 0, mWINWIDTH / H_DIVISOR, mWINHEIGHT);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
drawView("r", 0.5);
DrawExtras();
glPushAttrib(GL_ENABLE_BIT);
glEnable(GL_TEXTURE_2D);
glEnable(GL_LIGHTING);
glBindTexture(GL_TEXTURE_2D, _s2w_warpstereo_txt);
glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0,
mWINWIDTH / H_DIVISOR,
mWINHEIGHT);
glPopAttrib();
// 3. draw the left image
glDrawBuffer(GL_BACK);
glReadBuffer(GL_BACK);
glViewport(0, 0, mWINWIDTH / H_DIVISOR, mWINHEIGHT);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
drawView("l", -0.5);
DrawExtras();
// Remember the graphics state and return it at the end
glPushAttrib(GL_ALL_ATTRIB_BITS);
glDisable(GL_LIGHTING);
glDisable(GL_DEPTH_TEST);
glDisable(GL_BLEND);
// the key for when we are in wireframe mode! -
glPolygonMode(GL_FRONT_AND_BACK,GL_FILL);
glColor3f(1.0,1.0,1.0);
// interleave the rows in the back buffer!
// Right
glViewport(mWINWIDTH/H_DIVISOR, 0, mWINWIDTH/H_DIVISOR, mWINHEIGHT);
glDrawBuffer(GL_BACK);
//glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
#if (1)
// draw the texture we just captured...
glColor4f(1., 1., 1., 1.);
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
glOrtho(0, 1, 0, 1, 0, 1);
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glLoadIdentity();
glEnable(GL_TEXTURE_2D);
//fprintf(stderr, "using texture id %d to draw...\n", _s2w_warpstereo_txt);
glBindTexture(GL_TEXTURE_2D, _s2w_warpstereo_txt);
if (!_s2w_warpingactive || !_s2w_meshfn) {
// just one big quad filling the screen
glBegin(GL_QUADS);
glTexCoord2f(0., 0.);
glVertex2f(0., 0.);
glTexCoord2f(0., (float)mWINHEIGHT / (float)_s2w_warpstereo_h);
glVertex2f(0., 1.);
glTexCoord2f((float)mWINWIDTH / (float)_s2w_warpstereo_w / H_DIVISOR,
(float)mWINHEIGHT / (float)_s2w_warpstereo_h);
glVertex2f(1., 1.);
glTexCoord2f((float)mWINWIDTH / (float)_s2w_warpstereo_w / H_DIVISOR, 0.);
glVertex2f(1., 0.);
glEnd();
} else {
// (meshnx-1) * (meshny-1) quads across the screen
glBegin(GL_QUADS);
float max_tc_x = (float)mWINWIDTH / (float)H_DIVISOR /
(float)_s2w_warpstereo_w;
float max_tc_y = (float)mWINHEIGHT / (float)_s2w_warpstereo_h;
float on2asp = 0.5;
int ix, iy;
for (ix = 0; ix < meshnx-1; ix++) {
for (iy = 0; iy < meshny-1; iy++) {
// four corners
glTexCoord2f(mesh[ix][iy].x * max_tc_x,
mesh[ix][iy].y * max_tc_y);
glVertex2f(0.5 + on2asp * mesh[ix][iy].u,
0.5 + 0.5 * mesh[ix][iy].v);
glTexCoord2f(mesh[ix][iy+1].x * max_tc_x,
mesh[ix][iy+1].y * max_tc_y);
glVertex2f(0.5 + on2asp * mesh[ix][iy+1].u,
0.5 + 0.5 * mesh[ix][iy+1].v);
glTexCoord2f(mesh[ix+1][iy+1].x * max_tc_x,
mesh[ix+1][iy+1].y * max_tc_y);
glVertex2f(0.5 + on2asp * mesh[ix+1][iy+1].u,
0.5 + 0.5 * mesh[ix+1][iy+1].v);
glTexCoord2f(mesh[ix+1][iy].x * max_tc_x,
mesh[ix+1][iy].y * max_tc_y);
glVertex2f(0.5 + on2asp * mesh[ix+1][iy].u,
0.5 + 0.5 * mesh[ix+1][iy].v);
}
}
glEnd();
}
glDisable(GL_TEXTURE_2D);
glPopMatrix();
glMatrixMode(GL_PROJECTION);
glPopMatrix();
#endif
glPopAttrib();
// mark the texture as ready for use
_s2w_textureready = 1;
}
void draw_s2fishdome(CAMERA cam) {
// draw a fisheye / warped projection of the geometry
double r, near, far;
XYZ vp, vd, vr, vl;
XYZ vright, vleft, vup;
// Calculate various view vectors
vp = cam.vp;
vd = cam.vd;
vr = CrossProduct(vd,cam.vu);
vl = CrossProduct(cam.vu,vd);
vd = ArbitraryRotate(vd,cam.fishrotate,vr);
vup = CrossProduct(vr,vd);
vright = VectorAdd(vr,vd);
vleft = VectorAdd(vl,vd);
near = VectorLength(_s2priv_pmin(),_s2priv_pmax()) / 100;
far = MAX(cam.focallength,VectorLength(_s2priv_pmin(),
_s2priv_pmax())) * 20;
// Left
glDrawBuffer(GL_BACK);
glReadBuffer(GL_BACK);
glViewport(0,0,TEXTURESIZE,TEXTURESIZE);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
s2Perspective(90.0,1.0,near,far);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
s2LookAt(vp.x,vp.y,vp.z,vp.x+vleft.x,vp.y+vleft.y,vp.z+vleft.z,vup.x,vup.y,vup.z);
MakeLighting();
MakeMaterial();
MakeGeometry(FALSE, FALSE);
glBindTexture(GL_TEXTURE_2D,walltextureid[2]);
glCopyTexSubImage2D(GL_TEXTURE_2D,0,0,0,0,0,TEXTURESIZE,TEXTURESIZE);
// Right
glDrawBuffer(GL_BACK);
glReadBuffer(GL_BACK);
glViewport(0,0,TEXTURESIZE,TEXTURESIZE);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
s2Perspective(90.0,1.0,near,far);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
s2LookAt(vp.x,vp.y,vp.z,vp.x+vright.x,vp.y+vright.y,vp.z+vright.z,vup.x,vup.y,vup.z);
MakeLighting();
MakeMaterial();
MakeGeometry(FALSE, FALSE);
glBindTexture(GL_TEXTURE_2D,walltextureid[3]);
glCopyTexSubImage2D(GL_TEXTURE_2D,0,0,0,0,0,TEXTURESIZE,TEXTURESIZE);
// Top
glDrawBuffer(GL_BACK);
glReadBuffer(GL_BACK);
glViewport(0,0,TEXTURESIZE,TEXTURESIZE);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
s2Perspective(90.0,1.0,near,far);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
s2LookAt(vp.x,vp.y,vp.z,vp.x+vup.x,vp.y+vup.y,vp.z+vup.z,-vright.x,-vright.y,-vright.z);
MakeLighting();
MakeMaterial();
MakeGeometry(FALSE, FALSE);
glBindTexture(GL_TEXTURE_2D,walltextureid[0]);
glCopyTexSubImage2D(GL_TEXTURE_2D,0,0,0,0,0,TEXTURESIZE,TEXTURESIZE);
// Bottom
glDrawBuffer(GL_BACK);
glReadBuffer(GL_BACK);
glViewport(0,0,TEXTURESIZE,TEXTURESIZE);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
s2Perspective(90.0,1.0,near,far);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
s2LookAt(vp.x,vp.y,vp.z,vp.x-vup.x,vp.y-vup.y,vp.z-vup.z,-vleft.x,-vleft.y,-vleft.z);
MakeLighting();
MakeMaterial();
MakeGeometry(FALSE, FALSE);
glBindTexture(GL_TEXTURE_2D,walltextureid[1]);
glCopyTexSubImage2D(GL_TEXTURE_2D,0,0,0,0,0,TEXTURESIZE,TEXTURESIZE);
// Remember the graphics state and return it at the end
glPushAttrib(GL_ALL_ATTRIB_BITS);
glDisable(GL_LIGHTING);
glDisable(GL_ALPHA_TEST);
glDisable(GL_COLOR_MATERIAL);
glDisable(GL_DITHER);
//glDisable(GL_FOG);
glDisable(GL_LINE_SMOOTH);
glDisable(GL_LINE_STIPPLE);
glDisable(GL_SCISSOR_TEST);
glDisable(GL_STENCIL_TEST);
// Setup projections for the dome
glDrawBuffer(GL_BACK);
if (_s2fd_options->dometype == WARPMAP)
glClearColor(0.0,0.0,0.0,0.0);
else
glClearColor(0.05,0.05,0.05,0.0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glViewport(0,0,_s2fd_options->screenwidth,_s2fd_options->screenheight);
r = _s2fd_options->screenwidth / (double)_s2fd_options->screenheight;
switch (_s2fd_options->dometype) {
case TRUNCTOP:
case TRUNCBOTTOM:
glOrtho(-r*0.75,r*0.75,-0.75,0.75,0.1,10.0);
break;
case HSPHERICAL:
glOrtho(-r*0.75,r*0.75,-0.75,0.75,0.1,10.0);
break;
case VSPHERICAL:
case WARPMAP:
default:
glOrtho(-r,r,-1.0,1.0,0.1,10.0);
break;
}
// Create camera projection for dome
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
switch (_s2fd_options->dometype) {
case TRUNCBOTTOM:
s2LookAt(0.0,-1.0,0.25,0.0,0.0,0.25,0.0,0.0,1.0);
break;
case TRUNCTOP:
s2LookAt(0.0,-1.0,-0.25,0.0,0.0,-0.25,0.0,0.0,1.0);
break;
case HSPHERICAL:
case VSPHERICAL:
case WARPMAP:
default:
s2LookAt(0.0,-1.0,0.0,0.0,0.0,0.0,0.0,0.0,1.0);
break;
}
// Finally draw the dome geometry
glPolygonMode(GL_FRONT_AND_BACK,GL_FILL);
glColor3f(1.0,1.0,1.0);
DrawDome(TRUE,FALSE);
_s2_fadeinout();
DrawExtras();
glPopAttrib();
}