///----------------------------------------------------------------------------
///We need texture coordinates as if the light source were the eye point;
///this matrix takes us from eye space to the light's clip space
///by concatenating the following matrices: T = P.V.Ci
///where T = Texture matrix
/// P = Light's position projection matrix
/// V = Light's position modelview matrix
/// Ci= Camera's "Inverse" view matrix
///The tricky part is to compute the inverse camera view matrix but OpenGL
///will do that for us when the eye planes are specified
///----------------------------------------------------------------------------
void GLApp::CreateTextureMatrix()
{
GLdouble tmpMatrix[16];
glMatrixMode(GL_TEXTURE);
glPushMatrix();
{
glLoadIdentity();
glTranslated(0.5, 0.5, 0.5);
glScaled(0.5, 0.5, 0.5);
glMultMatrixd(m_LightProjectionMatrix);
glMultMatrixd(m_LightViewMatrix);
glGetDoublev(GL_TEXTURE_MATRIX, tmpMatrix);
}
glPopMatrix();
//We have the plane equation values but not in contiguos memory
//transposing the matrix will solve this
m_Geometry.Transpose4x4Matrix(tmpMatrix);
//Specify the texture coordinate plane equations
glTexGendv(GL_S, GL_EYE_PLANE, &tmpMatrix[0]);
glTexGendv(GL_T, GL_EYE_PLANE, &tmpMatrix[4]);
glTexGendv(GL_R, GL_EYE_PLANE, &tmpMatrix[8]);
glTexGendv(GL_Q, GL_EYE_PLANE, &tmpMatrix[12]);
}
void OpenGlRenderState::EnableProjectiveTexturing() const
{
#ifndef HAVE_GLES
const pangolin::OpenGlMatrix projmattrans = GetProjectiveTextureMatrix().Transpose();
glEnable(GL_TEXTURE_GEN_S);
glEnable(GL_TEXTURE_GEN_T);
glEnable(GL_TEXTURE_GEN_R);
glEnable(GL_TEXTURE_GEN_Q);
glTexGendv(GL_S, GL_EYE_PLANE, projmattrans.m);
glTexGendv(GL_T, GL_EYE_PLANE, projmattrans.m+4);
glTexGendv(GL_R, GL_EYE_PLANE, projmattrans.m+8);
glTexGendv(GL_Q, GL_EYE_PLANE, projmattrans.m+12);
glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_EYE_LINEAR);
glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_EYE_LINEAR);
glTexGeni(GL_R, GL_TEXTURE_GEN_MODE, GL_EYE_LINEAR);
glTexGeni(GL_Q, GL_TEXTURE_GEN_MODE, GL_EYE_LINEAR);
#endif
}
void
make_stripes(void) {
int i, j;
static GLubyte data[16*8];
static GLubyte data1[16*8];
static GLubyte data2[16*8];
double d[] = { 0.f, 1.f, 0.f, 1.f};
for(i = 0; i < 8; i++) {
for(j = 0; j < 16; j++) {
float f = 1.;
if (i < 2 || j < 4 ) f = 0.f;
data[j*8+i] = f*255;
f = 0.f;
if (i < 4) f = 1.f;
data1[j*8+i] = f*255;
f = 0.f;
if (j < 8) f = 1.f;
data2[j*8+i] = f*255;
}
}
glBindTexture(GL_TEXTURE_2D, 1);
glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE, 8, 16, 0, GL_LUMINANCE, GL_UNSIGNED_BYTE, data);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glBindTexture(GL_TEXTURE_2D, 2);
glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE, 8, 16, 0, GL_LUMINANCE, GL_UNSIGNED_BYTE, data1);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glBindTexture(GL_TEXTURE_2D, 3);
glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE, 8, 16, 0, GL_LUMINANCE, GL_UNSIGNED_BYTE, data2);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
#if 0
glMatrixMode(GL_TEXTURE);
glScalef(50.f, 1.f, 1.f);
glScalef(.5f, .5f, 1.f);
glMatrixMode(GL_MODELVIEW);
#endif
glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR);
glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR);
glTexGendv(GL_T, GL_OBJECT_PLANE, d);
CHECK_ERROR("make_stripes()");
}
void __glXDisp_TexGendv(GLbyte *pc)
{
#ifdef __GLX_ALIGN64
GLenum pname;
GLint cmdlen;
GLint compsize;
pname = *(GLenum *)(pc + 4);
compsize = __glTexGendv_size(pname);
if (compsize < 0) compsize = 0;
cmdlen = __GLX_PAD(8+compsize*8);
if ((unsigned long)(pc) & 7) {
__GLX_MEM_COPY(pc-4, pc, cmdlen);
pc -= 4;
}
#endif
glTexGendv(
*(GLenum *)(pc + 0),
*(GLenum *)(pc + 4),
(GLdouble *)(pc + 8)
);
}
void Scarry::draw(wardraw_t *wd){
Scarry *const p = this;
static int init = 0;
static suftex_t *pst;
static suf_t *sufbase = NULL;
if(!w)
return;
/* cull object */
/* if(beamer_cull(this, wd))
return;*/
// wd->lightdraws++;
draw_healthbar(this, wd, health / getMaxHealth(), getHitRadius(), -1., capacitor / maxenergy());
if(wd->vw->gc->cullFrustum(pos, getHitRadius()))
return;
#if 0
if(init == 0) do{
init = 1;
sufbase = CallLoadSUF("models/spacecarrier.bin");
if(!sufbase) break;
CallCacheBitmap("bridge.bmp", "bridge.bmp", NULL, NULL);
CallCacheBitmap("beamer_panel.bmp", "beamer_panel.bmp", NULL, NULL);
CallCacheBitmap("bricks.bmp", "bricks.bmp", NULL, NULL);
CallCacheBitmap("runway.bmp", "runway.bmp", NULL, NULL);
suftexparam_t stp;
stp.flags = STP_MAGFIL | STP_MINFIL | STP_ENV;
stp.magfil = GL_LINEAR;
stp.minfil = GL_LINEAR;
stp.env = GL_ADD;
stp.mipmap = 0;
CallCacheBitmap5("engine2.bmp", "engine2br.bmp", &stp, "engine2.bmp", NULL);
pst = AllocSUFTex(sufbase);
extern GLuint screentex;
glNewList(pst->a[0].list, GL_COMPILE);
glBindTexture(GL_TEXTURE_2D, screentex);
glTexEnvi(GL_TEXTURE_2D, GL_TEXTURE_ENV_MODE, GL_REPLACE);
glDisable(GL_LIGHTING);
glEndList();
} while(0);
if(sufbase){
static const double normal[3] = {0., 1., 0.};
double scale = SCARRY_SCALE;
static const GLdouble rotaxis[16] = {
-1,0,0,0,
0,1,0,0,
0,0,-1,0,
0,0,0,1,
};
Mat4d mat;
glPushAttrib(GL_TEXTURE_BIT | GL_LIGHTING_BIT | GL_CURRENT_BIT | GL_ENABLE_BIT);
glPushMatrix();
transform(mat);
glMultMatrixd(mat);
#if 1
for(int i = 0; i < nhitboxes; i++){
Mat4d rot;
glPushMatrix();
gldTranslate3dv(hitboxes[i].org);
rot = hitboxes[i].rot.tomat4();
glMultMatrixd(rot);
hitbox_draw(this, hitboxes[i].sc);
glPopMatrix();
}
#endif
Mat4d modelview, proj;
glGetDoublev(GL_MODELVIEW_MATRIX, modelview);
glGetDoublev(GL_PROJECTION_MATRIX, proj);
Mat4d trans = proj * modelview;
texture((glPushMatrix(),
glScaled(1./2., 1./2., 1.),
glTranslated(1, 1, 0),
glMultMatrixd(trans)
));
glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_EYE_LINEAR);
glTexGendv(GL_S, GL_EYE_PLANE, Vec4d(1,0,0,0));
glEnable(GL_TEXTURE_GEN_S);
glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_EYE_LINEAR);
glTexGendv(GL_T, GL_EYE_PLANE, Vec4d(0,1,0,0));
glEnable(GL_TEXTURE_GEN_T);
glTexGeni(GL_R, GL_TEXTURE_GEN_MODE, GL_EYE_LINEAR);
glTexGeniv(GL_R, GL_EYE_PLANE, Vec4<int>(0,0,1,0));
glEnable(GL_TEXTURE_GEN_R);
glTexGeni(GL_Q, GL_TEXTURE_GEN_MODE, GL_EYE_LINEAR);
glTexGeniv(GL_Q, GL_EYE_PLANE, Vec4<int>(0,0,0,1));
glEnable(GL_TEXTURE_GEN_Q);
glPushMatrix();
glScaled(scale, scale, scale);
glMultMatrixd(rotaxis);
DecalDrawSUF(sufbase, SUF_ATR, NULL, pst, NULL, NULL);
glPopMatrix();
texture((glPopMatrix()));
glPopMatrix();
glPopAttrib();
}
#endif
}
void Scarry::drawtra(wardraw_t *wd){
st::drawtra(wd);
Scarry *p = this;
Scarry *pt = this;
Mat4d mat;
Vec3d pa, pb, pa0(.01, 0, 0), pb0(-.01, 0, 0);
double scale;
/* if(scarry_cull(pt, wd))
return;*/
if(wd->vw->gc->cullFrustum(pos, getHitRadius()))
return;
scale = fabs(wd->vw->gc->scale(this->pos));
transform(mat);
const double blastscale = .04;
drawCapitalBlast(wd, Vec3d(0, 0, .55), blastscale);
drawCapitalBlast(wd, Vec3d(.08, .08, .55), blastscale);
drawCapitalBlast(wd, Vec3d(-.08, .08, .55), blastscale);
drawCapitalBlast(wd, Vec3d(-.08, -.08, .55), blastscale);
drawCapitalBlast(wd, Vec3d(.08, -.08, .55), blastscale);
pa = pt->rot.trans(pa0);
pa += pt->pos;
pb = pt->rot.trans(pb0);
pb += pt->pos;
glColor4ub(255,255,9,255);
glBegin(GL_LINES);
glVertex3dv(pa);
glVertex3dv(pb);
glEnd();
{
int i;
static const avec3_t lights[] = {
{0, 520 * SCARRY_SCALE, 220 * SCARRY_SCALE},
{0, -520 * SCARRY_SCALE, 220 * SCARRY_SCALE},
{140 * SCARRY_SCALE, 370 * SCARRY_SCALE, 220 * SCARRY_SCALE},
{-140 * SCARRY_SCALE, 370 * SCARRY_SCALE, 220 * SCARRY_SCALE},
{140 * SCARRY_SCALE, -370 * SCARRY_SCALE, 220 * SCARRY_SCALE},
{-140 * SCARRY_SCALE, -370 * SCARRY_SCALE, 220 * SCARRY_SCALE},
{100 * SCARRY_SCALE, -360 * SCARRY_SCALE, -600 * SCARRY_SCALE},
{100 * SCARRY_SCALE, 360 * SCARRY_SCALE, -600 * SCARRY_SCALE},
{ 280 * SCARRY_SCALE, 20 * SCARRY_SCALE, 520 * SCARRY_SCALE},
{ 280 * SCARRY_SCALE, -20 * SCARRY_SCALE, 520 * SCARRY_SCALE},
{-280 * SCARRY_SCALE, 20 * SCARRY_SCALE, 520 * SCARRY_SCALE},
{-280 * SCARRY_SCALE, -20 * SCARRY_SCALE, 520 * SCARRY_SCALE},
{-280 * SCARRY_SCALE, 20 * SCARRY_SCALE, -300 * SCARRY_SCALE},
{-280 * SCARRY_SCALE, -20 * SCARRY_SCALE, -300 * SCARRY_SCALE},
{ 280 * SCARRY_SCALE, 20 * SCARRY_SCALE, -480 * SCARRY_SCALE},
{ 280 * SCARRY_SCALE, -20 * SCARRY_SCALE, -480 * SCARRY_SCALE},
};
avec3_t pos;
double rad = .01;
double t;
GLubyte col[4] = {255, 31, 31, 255};
random_sequence rs;
init_rseq(&rs, (unsigned long)this);
/* color calculation of static navlights */
t = fmod(wd->vw->viewtime + drseq(&rs) * 2., 2.);
if(t < 1.){
rad *= (t + 1.) / 2.;
col[3] *= t;
}
else{
rad *= (2. - t + 1.) / 2.;
col[3] *= 2. - t;
}
for(i = 0 ; i < numof(lights); i++){
mat4vp3(pos, mat, lights[i]);
gldSpriteGlow(pos, rad, col, wd->vw->irot);
}
/* runway lights */
if(1 < scale * .01){
col[0] = 0;
col[1] = 191;
col[2] = 255;
for(i = 0 ; i <= 10; i++){
avec3_t pos0;
pos0[0] = -160 * SCARRY_SCALE;
pos0[1] = 20 * SCARRY_SCALE + .0025;
pos0[2] = (i * -460 + (10 - i) * -960) * SCARRY_SCALE / 10;
rad = .005 * (1. - fmod(i / 10. + t / 2., 1.));
col[3] = 255/*rad * 255 / .01*/;
mat4vp3(pos, mat, pos0);
gldSpriteGlow(pos, rad, col, wd->vw->irot);
pos0[0] = -40 * SCARRY_SCALE;
mat4vp3(pos, mat, pos0);
gldSpriteGlow(pos, rad, col, wd->vw->irot);
pos0[1] = -20 * SCARRY_SCALE - .0025;
mat4vp3(pos, mat, pos0);
gldSpriteGlow(pos, rad, col, wd->vw->irot);
pos0[0] = -160 * SCARRY_SCALE;
mat4vp3(pos, mat, pos0);
gldSpriteGlow(pos, rad, col, wd->vw->irot);
}
}
/* for(i = 0; i < numof(p->turrets); i++)
mturret_drawtra(&p->turrets[i], pt, wd);*/
}
static int init = 0;
static suftex_t *pst;
static suf_t *sufbase = NULL;
if(init == 0) do{
init = 1;
sufbase = CallLoadSUF("models/spacecarrier.bin");
} while(0);
if(sufbase){
static const double normal[3] = {0., 1., 0.};
double scale = SCARRY_SCALE;
static const GLdouble rotaxis[16] = {
-1,0,0,0,
0,1,0,0,
0,0,-1,0,
0,0,0,1,
};
Mat4d mat;
glPushAttrib(GL_TEXTURE_BIT | GL_LIGHTING_BIT | GL_CURRENT_BIT | GL_ENABLE_BIT);
glEnable(GL_CULL_FACE);
glPushMatrix();
transform(mat);
glMultMatrixd(mat);
extern GLuint screentex;
glBindTexture(GL_TEXTURE_2D, screentex);
glTexEnvi(GL_TEXTURE_2D, GL_TEXTURE_ENV_MODE, GL_REPLACE);
glColor4f(1.,1.,1.,1.);
glDisable(GL_LIGHTING);
glEnable(GL_TEXTURE_2D);
Mat4d modelview, proj;
glGetDoublev(GL_MODELVIEW_MATRIX, modelview);
glGetDoublev(GL_PROJECTION_MATRIX, proj);
Mat4d trans = proj * modelview;
texture((glPushMatrix(),
glScaled(1./2., 1./2., 1.),
glTranslated(1, 1, 0),
glMultMatrixd(trans)
));
glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_EYE_LINEAR);
glTexGendv(GL_S, GL_EYE_PLANE, Vec4d(.9,0,0,0));
glEnable(GL_TEXTURE_GEN_S);
glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_EYE_LINEAR);
glTexGendv(GL_T, GL_EYE_PLANE, Vec4d(0,.9,0,0));
glEnable(GL_TEXTURE_GEN_T);
glTexGeni(GL_R, GL_TEXTURE_GEN_MODE, GL_EYE_LINEAR);
glTexGendv(GL_R, GL_EYE_PLANE, Vec4d(0,0,.9,0));
glEnable(GL_TEXTURE_GEN_R);
glTexGeni(GL_Q, GL_TEXTURE_GEN_MODE, GL_EYE_LINEAR);
glTexGeniv(GL_Q, GL_EYE_PLANE, Vec4<int>(0,0,0,1));
glEnable(GL_TEXTURE_GEN_Q);
glPushMatrix();
glScaled(-scale, scale, -scale);
DrawSUF(sufbase, 0, NULL);
glPopMatrix();
texture((glPopMatrix()));
glPopMatrix();
glPopAttrib();
}
}
M(void, glTexGendv, jint coord, jint pname, jobject params) {
glTexGendv(coord, pname, BUFF(GLdouble, params));
}
/* Render::initializeShadowMap: initialize OpenGL for shadow mapping */
void Render::initializeShadowMap(int textureSize)
{
static const GLdouble genfunc[][4] = {
{ 1.0, 0.0, 0.0, 0.0 },
{ 0.0, 1.0, 0.0, 0.0 },
{ 0.0, 0.0, 1.0, 0.0 },
{ 0.0, 0.0, 0.0, 1.0 },
};
/* initialize model view matrix */
glPushMatrix();
glLoadIdentity();
/* use 4th texture unit for depth texture, make it current */
glActiveTextureARB(GL_TEXTURE3_ARB);
/* prepare a texture object for depth texture rendering in frame buffer object */
glGenTextures(1, &m_depthTextureID);
glBindTexture(GL_TEXTURE_2D, m_depthTextureID);
/* assign depth component to the texture */
glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT, textureSize, textureSize, 0, GL_DEPTH_COMPONENT, GL_UNSIGNED_BYTE, 0);
/* set texture parameters for shadow mapping */
#ifdef RENDER_SHADOWPCF
/* use hardware PCF */
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
#else
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
#endif /* RENDER_SHADOWPCF */
/* tell OpenGL to compare the R texture coordinates to the (depth) texture value */
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_MODE, GL_COMPARE_R_TO_TEXTURE);
/* also tell OpenGL to get the compasiron result as alpha value */
glTexParameteri(GL_TEXTURE_2D, GL_DEPTH_TEXTURE_MODE, GL_ALPHA);
/* set texture coordinates generation mode to use the raw texture coordinates (S, T, R, Q) in eye view */
glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_EYE_LINEAR);
glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_EYE_LINEAR);
glTexGeni(GL_R, GL_TEXTURE_GEN_MODE, GL_EYE_LINEAR);
glTexGeni(GL_Q, GL_TEXTURE_GEN_MODE, GL_EYE_LINEAR);
glTexGendv(GL_S, GL_EYE_PLANE, genfunc[0]);
glTexGendv(GL_T, GL_EYE_PLANE, genfunc[1]);
glTexGendv(GL_R, GL_EYE_PLANE, genfunc[2]);
glTexGendv(GL_Q, GL_EYE_PLANE, genfunc[3]);
/* finished configuration of depth texture: unbind the texture */
glBindTexture(GL_TEXTURE_2D, 0);
/* allocate a frame buffer object (FBO) for depth buffer rendering */
glGenFramebuffersEXT(1, &m_fboID);
/* switch to the newly allocated FBO */
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, m_fboID);
/* bind the texture to the FBO, telling that it should render the depth information to the texture */
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, GL_TEXTURE_2D, m_depthTextureID, 0);
/* also tell OpenGL not to draw and read the color buffers */
glDrawBuffer(GL_NONE);
glReadBuffer(GL_NONE);
/* check FBO status */
if (glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT) != GL_FRAMEBUFFER_COMPLETE_EXT) {
/* cannot use FBO */
}
/* finished configuration of FBO, now switch to default frame buffer */
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);
/* reset the current texture unit to default */
glActiveTextureARB(GL_TEXTURE0_ARB);
/* restore the model view matrix */
glPopMatrix();
}
void gl4es_glMultiTexGendv(GLenum texunit, GLenum coord, GLenum pname, const GLdouble *params) {
text(glTexGendv(coord, pname, params));
}
void ApronProc::DrawToScene(double dAlt,const std::vector<GLuint> texlist){
//static const GLdouble xcoord[]={0.001,0.0,0.0,0.0};
//static const GLdouble ycoord[]={0.0,0.001,0.0,0.0};
//glBindTexture(GL_TEXTURE_2D,texlist[(int)Textures::TextureEnum::APRON]);
//glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
//glTexGeni(GL_S,GL_TEXTURE_GEN_MODE,GL_OBJECT_LINEAR);
//glTexGendv(GL_S,GL_OBJECT_PLANE,xcoord);
//glEnable(GL_TEXTURE_GEN_S);
//glTexGeni(GL_T,GL_TEXTURE_GEN_MODE,GL_OBJECT_LINEAR);
//glTexGendv(GL_T,GL_OBJECT_PLANE,ycoord);
//glEnable(GL_TEXTURE_GEN_T);
//glEnable(GL_TEXTURE_2D);
//
//glColor3d(1.0,1.0,1.0);
//GLdouble buf[256][3];
//GLUtesselatorObj *tess=gluNewTess();
//
//gluTessCallback(tess, GLU_TESS_BEGIN, (GLvoid (__stdcall *) ( )) &glBegin);
//gluTessCallback(tess, GLU_TESS_END, (GLvoid (__stdcall *) ( )) &glEnd);
//gluTessCallback(tess, GLU_TESS_VERTEX, (GLvoid (__stdcall *) ( )) &glVertex3dv);
//gluTessCallback(tess, GLU_TESS_EDGE_FLAG, (GLvoid (__stdcall *) ( )) &glEdgeFlag);
//gluTessCallback(tess, GLU_TESS_COMBINE, (GLvoid (__stdcall *) ( )) &combineCallback);
//gluTessCallback(tess, GLU_TESS_ERROR, (GLvoid (__stdcall *) ( )) &errorCallback);
//gluTessProperty(tess, GLU_TESS_WINDING_RULE, GLU_TESS_WINDING_NONZERO);
//gluTessBeginPolygon(tess,NULL);
//gluTessBeginContour(tess);
//Path * pApronway=this->serviceLocationPath();
//for( int i=0;i<pApronway->getCount();i++){
// Point & _p=pApronway->getPoint(i);
// buf[i][0]=_p.getX();
// buf[i][1]=_p.getY();
// buf[i][2]=0.0;
// gluTessVertex(tess,buf[i],buf[i]);
//}
//gluTessEndContour(tess);
//gluTessEndPolygon(tess);
//gluDeleteTess(tess);
//
//glDisable(GL_TEXTURE_2D);
//glDisable(GL_TEXTURE_GEN_S);
//glDisable(GL_TEXTURE_GEN_T);
static const GLdouble xcoord[]={0.001,0.0,0.0,0.0};
static const GLdouble ycoord[]={0.0,0.001,0.0,0.0};
glBindTexture(GL_TEXTURE_2D,texlist[(int)Textures::APRON]);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
glTexGeni(GL_S,GL_TEXTURE_GEN_MODE,GL_OBJECT_LINEAR);
glTexGendv(GL_S,GL_OBJECT_PLANE,xcoord);
glEnable(GL_TEXTURE_GEN_S);
glTexGeni(GL_T,GL_TEXTURE_GEN_MODE,GL_OBJECT_LINEAR);
glTexGendv(GL_T,GL_OBJECT_PLANE,ycoord);
glEnable(GL_TEXTURE_GEN_T);
glEnable(GL_TEXTURE_2D);
GLdouble buf[256][3];
CTessellationManager* pTM = CTessellationManager::GetInstance();
pTM->Init(CTessellationManager::Render);
pTM->BeginPolygon();
pTM->BeginContour();
Path * pApronway=this->serviceLocationPath();
for( int i=0;i<pApronway->getCount();i++){
Point _p=pApronway->getPoint(i);
buf[i][0]=_p.getX();
buf[i][1]=_p.getY();
buf[i][2]=dAlt;
pTM->ContourVertex(buf[i]);
}
pTM->EndContour();
pTM->EndPolygon();
pTM->End();
glDisable(GL_TEXTURE_2D);
glDisable(GL_TEXTURE_GEN_S);
glDisable(GL_TEXTURE_GEN_T);
}
void ApplyShadowMap()
{
// Now comes the juice of this tutorial. What this function will do is:
//
// 1) Turn on texture mapping
// 2) Bind our shadow texture that holds the depth values
// 3) Set our texture mode and function for shadow mapping
// 4) Turn on and set OpenGL texture generation by GL_EYE_LINEAR
// 5) Load the light's matrices into the texture matrix
// 6) Render the world that will be shadowed
// 7) Restore and turn everything off again
//
// Turn on our texture unit for shadow mapping and bind our depth texture
glActiveTextureARB(GL_TEXTURE0_ARB);
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, g_Texture[SHADOW_ID]);
// Here is where we set the mode and function for shadow-mapping in fixed functionality.
// The mode we use is GL_TEXTURE_COMPARE_MODE_ARB, with GL_COMPARE_R_TO_TEXTURE_ARB, which
// tells OpenGL that we want to compare the depth value in our world to the current
// texture's depth value. We then set the compare function to GL_LEQUAL, which says that
// we will not shadow the current pixel if the depth value is less than or equal to
// the texture's depth value.
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_MODE_ARB, GL_COMPARE_R_TO_TEXTURE_ARB);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_COMPARE_FUNC_ARB, GL_LEQUAL);
// Let's explain really fast about why we need a "bias" matrix. Well, when we multiply
// our world data by the projection and modelview matrix it converts it to clip space,
// which is a box that is measured in -1 to 1. Then this is later converted to screen
// coordinates. Now, our texture coordinates are clamped from 0 to 1 right? We are
// working in the light's clip space and we want to convert the -1 to 1 ratio to a
// 0 to 1 ratio, which will measure up with our texture coordinates. To do this we
// need a "bias" matrix that will convert from -1 to 1 to a 0 to 1 ratio. We first
// load the bias matrix into our texture matrix and then multiply the projection and
// modelview matrix by the bias matrix. The bias matrix that will do this is below.
// It's the same thing as doing this to every coordinate: newCoord = (oldCoord + 1) / 2;
const float mBias[] = {0.5, 0.0, 0.0, 0.0,
0.0, 0.5, 0.0, 0.0,
0.0, 0.0, 0.5, 0.0,
0.5, 0.5, 0.5, 1.0
};
// Now comes the complicated part to grasp at first. If you have never used the
// texture generation functionality in OpenGL for sphere mapping or something else,
// I will give a basic explanation of what it does. So that we don't have to
// do the work ourselves of calculating every UV coordinate, we can have the UV
// coordinates generated by OpenGL for us, given a bunch of different inputs to work from.
// We can use OpenGL's texture generation functionality to project our camera depth values
// into the light's clip space. Since our matrices are 4x4, we need to do our
// projection in 4D. Thus, we use texture coordinates S, T, R and Q.
// We first create planes for each axis (x, y, z, w). This will be used
// with our projection of our camera's view to the light's clip space and
// make sure the texture coordinates don't move when our camera moves, but
// are the same no matter where our camera is looking. The equation for
// doing projected texturing is:
//
// mProjectedTexture = mLightProjection * mLightModelview * mCameraInverse;
//
// We say the "camera inverse", but really it is the modelview matrix's inverse
// that has the camera's view applied to it. So this is what we mean when we say that.
// Usually we will need to multiply the inverse of our camera matrix by the projection
// and modelview matrix of the light; however, when using these planes for our camera
// OpenGL will calculate the inverse of our camera for us. In the GLSL version of
// shadow mapping we calculate the camera inverse ourselves.
// Create the eye planes for generating texture coordinates
const double xPlane[] = {1.0, 0.0, 0.0, 0.0};
const double yPlane[] = {0.0, 1.0, 0.0, 0.0};
const double zPlane[] = {0.0, 0.0, 1.0, 0.0};
const double wPlane[] = {0.0, 0.0, 0.0, 1.0};
// Enable texture generation for S, T, R, and Q
glEnable(GL_TEXTURE_GEN_S);
glEnable(GL_TEXTURE_GEN_T);
glEnable(GL_TEXTURE_GEN_R);
glEnable(GL_TEXTURE_GEN_Q);
// Set each texture coordinate's texture gen mode to use the camera.
// This will have OpenGL incorporate the camera's inverse for us.
glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_EYE_LINEAR);
glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_EYE_LINEAR);
glTexGeni(GL_R, GL_TEXTURE_GEN_MODE, GL_EYE_LINEAR);
glTexGeni(GL_Q, GL_TEXTURE_GEN_MODE, GL_EYE_LINEAR);
// Set our planes for each coordinate in order to project the texture appropriatly.
glTexGendv(GL_S, GL_EYE_PLANE, xPlane );
glTexGendv(GL_T, GL_EYE_PLANE, yPlane );
glTexGendv(GL_R, GL_EYE_PLANE, zPlane );
glTexGendv(GL_Q, GL_EYE_PLANE, wPlane );
// Now we actually do the matrix multiplication. First we switch to texture
// mode. That way we aren't effecting the modelview matrix. Then we load in
// the bias matrix, multiply that by the light's projection matrix, then multiply
// that result by the light's modelview matrix. This, in conjunction with our
// camera inverse matrix calculated by OpenGL for us, gives us the right matrix
// for projecting everything that needs to be projected. That is, the camera's
// depth values into the light's clip space, then the generated shadow map onto
// the geometry of the world.
glMatrixMode(GL_TEXTURE);
glLoadMatrixf(mBias); // The bias matrix to convert to a 0 to 1 ratio
glMultMatrixf(g_mProjection); // The light's projection matrix
glMultMatrixf(g_mModelView); // The light's modelview matrix
glMatrixMode(GL_MODELVIEW); // Switch back to normal modelview mode
RenderWorld(); // Render the world that needs to be shadowed
// Now that the world is shadowed and we are done with the texture generation,
// let's set everything back to normal by resetting the texture matrix.
glMatrixMode(GL_TEXTURE);
glLoadIdentity();
glMatrixMode(GL_MODELVIEW);
// Turn off texture generation for our S, T, R and Q coordinates
glDisable(GL_TEXTURE_GEN_S);
glDisable(GL_TEXTURE_GEN_T);
glDisable(GL_TEXTURE_GEN_R);
glDisable(GL_TEXTURE_GEN_Q);
// Turn the first multi-texture pass off
glActiveTextureARB(GL_TEXTURE0_ARB);
glDisable(GL_TEXTURE_2D);
}