-void FGHorizon::Render(void){
- double pitch;
- double roll;
- float shifted, alpha, theta;
- float epsi = 360 / 180;
- GLboolean Light;
- GLfloat normal[2];
-
- int n1, n2, n, dn, rot, tmp1, tmp2;
- float a;
-
- GLfloat material[] = { 0.714844, 0.265625, 0.056875 ,1.0};
- GLfloat material2[] = {0.6640625, 0.921875, 0.984375, 1.0};
- GLfloat material3[] = {0.2, 0.2, 0.2, 1.0};
- GLfloat material4[] = {0.8, 0.8, 0.8, 1.0};
- GLfloat material5[] = {0.0, 0.0, 0.0, 1.0};
- GLfloat direction[] = {0.0, 0.0, 0.0};
- GLfloat light_position[4];
- GLfloat light_ambient[] = {0.7, 0.7, 0.7, 1.0};
- GLfloat light_ambient2[] = {0.7, 0.7, 0.7, 1.0};
- GLfloat light_diffuse[] = {1.0, 1.0, 1.0, 1.0};
- GLfloat light_specular[] = {1.0, 1.0, 1.0, 1.0};
-
- pitch = get_pitch() * RAD_TO_DEG;
- if(pitch > 45)
- pitch = 45;
-
- if(pitch < -45)
- pitch = -45;
-
- roll = get_roll() * RAD_TO_DEG;
-
- xglEnable(GL_NORMALIZE);
- xglEnable(GL_LIGHTING);
- xglEnable(GL_TEXTURE_2D);
- xglEnable(GL_LIGHT1);
- xglDisable(GL_LIGHT2);
- xglDisable(GL_LIGHT0);
- xglMatrixMode(GL_MODELVIEW);
- xglLoadIdentity();
- xglTranslatef(XPos, YPos, 0);
- xglTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
- xglMatrixMode(GL_TEXTURE);
- xglPushMatrix();
-
- // computations for the non-textured parts of the AH
-
- shifted = -((pitch / 10) * 7.0588235);
-
- if(shifted > (bottom - radius)){
- theta = (180 - (acos((bottom - shifted) / radius)*RAD_TO_DEG));
- n = (int)(theta / epsi) - 1;
- n1 = n;
- n2 = (180 - n1) + 2;
- dn = n2 - n1;
- rot = (int)(roll / epsi);
- n1 += rot + 45;
- n2 += rot + 45;
- }
-
- if(shifted < (-top + radius)){
- theta = ((acos((-top - shifted) / radius)*RAD_TO_DEG));
- n = (int)(theta / epsi) + 1;
- n1 = n;
- n2 = (180 - n1) + 2;
- dn = n2 - n1;
- rot = (int)(roll / epsi);
- n1 += rot - 45;
- n2 += rot - 45;
- if(n1 < 0){ n1 += 180; n2 +=180;}
- }
-
- // end of computations
-
- light_position[0] = 0.0;
- light_position[1] = 0.0;
- light_position[2] = 1.5;
- light_position[3] = 0.0;
- xglLightfv(GL_LIGHT1, GL_POSITION, light_position);
- xglLightfv(GL_LIGHT1, GL_AMBIENT, light_ambient);
- xglLightfv(GL_LIGHT1, GL_DIFFUSE, light_diffuse);
- xglLightfv(GL_LIGHT1, GL_SPECULAR, light_specular);
- xglLightfv(GL_LIGHT1, GL_SPOT_DIRECTION, direction);
-
-#ifdef GL_VERSION_1_1
- // FIXME!!
- xglBindTexture(GL_TEXTURE_2D, FGPanel::OurPanel->panel_tex_id[1]);
-#elif GL_EXT_texture_object
- // FIXME!!
- xglBindTextureEXT(GL_TEXTURE_2D, FGPanel::OurPanel->panel_tex_id[1]);
-#else
-# error port me
-#endif
-
- xglLoadIdentity();
- xglTranslatef(0.0, ((pitch / 10) * 0.046875), 0.0);
- xglTranslatef((texXPos/256), (texYPos/256), 0.0);
- xglRotatef(-roll, 0.0, 0.0, 1.0);
- xglScalef(1.7, 1.7, 0.0);
-
- // the following loop draws the textured part of the AH
-
- xglMaterialf(GL_FRONT, GL_SHININESS, 85.0);
-
- xglMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, material4);
- xglMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, material5);
- xglMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, material3);
-
- xglMatrixMode(GL_MODELVIEW);
- xglBegin(GL_TRIANGLES);
-
- int i;
- for(i=45; i < 225; i++){
- xglTexCoord2f(0.0, 0.0);
- xglNormal3f(0.0, 0.0, 0.6);
- xglVertex3f(0.0, 0.0, 0.0);
- xglTexCoord2f(texCoord[i % 180][0], texCoord[i % 180][1]);
- xglNormal3f(normals[i % 180][0], normals[i % 180][1], 0.6);
- xglVertex3f(vertices[i % 180][0], vertices[i % 180][1], 0.0);
- n = (i + 1) % 180;
- xglTexCoord2f(texCoord[n][0], texCoord[n][1]);
- xglNormal3f(normals[n][0], normals[n][1], 0.6);
- xglVertex3f(vertices[n][0], vertices[n][1], 0.0);
- }
- xglEnd();
-
-
- if((shifted > (bottom - radius)) && (n1 < 1000) && (n1 > 0)){
-
- a = sin(theta * DEG_TO_RAD) * sin(theta * DEG_TO_RAD);
- light_ambient2[0] = a;
- light_ambient2[1] = a;
- light_ambient2[2] = a;
-
- xglLightfv(GL_LIGHT1, GL_AMBIENT, light_ambient2);
- xglLightfv(GL_LIGHT1, GL_DIFFUSE, light_ambient2);
- xglLightfv(GL_LIGHT1, GL_SPECULAR, light_ambient2);
-
- xglBegin(GL_TRIANGLES);
-
- tmp1 = n1; tmp2 = n2;
-
- for(i = tmp1; i < tmp2 + 1; i++){
- n = i % 180;
- xglNormal3f(0.0, 0.0, 1.5);
- xglTexCoord2f((56 / 256), (140 / 256));
- xglVertex3f(((vertices[n1 % 180][0] + vertices[n2 % 180][0]) / 2), ((vertices[n1 % 180][1] + vertices[n2 % 180][1]) / 2), 0.0);
-
- xglTexCoord2f((57 / 256), (139 / 256));
- xglNormal3f(normals[n][0], normals[n][1], normals[n][3]);
- xglVertex3f(vertices[n][0], vertices[n][1], 0.0);
-
- n = (i + 1) % 180;
- xglTexCoord2f((57 / 256), (139 / 256));
- xglNormal3f(normals[n][0], normals[n][1], normals[n][3]);
- xglVertex3f(vertices[n][0], vertices[n][1], 0.0);
- }
- xglEnd();
- }
-
- if((shifted < (-top + radius)) && (n1 < 1000) && (n1 > 0)){
- a = sin(theta * DEG_TO_RAD) * sin(theta * DEG_TO_RAD);
- light_ambient2[0] = a;
- light_ambient2[1] = a;
- light_ambient2[2] = a;
-
- xglLightfv(GL_LIGHT1, GL_AMBIENT, light_ambient2);
- xglLightfv(GL_LIGHT1, GL_DIFFUSE, light_ambient2);
- xglLightfv(GL_LIGHT1, GL_SPECULAR, light_ambient2);
- xglMaterialf(GL_FRONT, GL_SHININESS, a * 85);
- xglBegin(GL_TRIANGLES);
- tmp1 = n1; tmp2 = n2;
- for(i = tmp1; i <= tmp2; i++){
- n = i % 180;
- xglNormal3f(0.0, 0.0, 1.5);
- xglTexCoord2f((73 / 256), (237 / 256));
- xglVertex3f(((vertices[n1 % 180][0] + vertices[n2 % 180][0]) / 2), ((vertices[n1 % 180][1] + vertices[n2 % 180][1]) / 2), 0.0);
-
- xglTexCoord2f((73 / 256), (236 / 256));
- xglNormal3f(normals[n][0], normals[n][1], normals[n][2]);
- xglVertex3f(vertices[n][0], vertices[n][1], 0.0);
-
- n = (i + 1) % 180;
- xglTexCoord2f((73 / 256), (236 / 256));
- xglNormal3f(normals[n][0], normals[n][1], normals[n][2]);
- xglVertex3f(vertices[n][0], vertices[n][1], 0.0);
- }
- xglEnd();
- }
-
- // Now we will have to draw the small triangle indicating the roll value
-
- xglDisable(GL_LIGHTING);
- xglDisable(GL_TEXTURE_2D);
-
- xglRotatef(roll, 0.0, 0.0, 1.0);
-
- xglBegin(GL_TRIANGLES);
- xglColor3f(1.0, 1.0, 1.0);
- xglVertex3f(0.0, radius, 0.0);
- xglVertex3f(-3.0, (radius - 7.0), 0.0);
- xglVertex3f(3.0, (radius - 7.0), 0.0);
- xglEnd();
-
- xglLoadIdentity();
-
- xglBegin(GL_POLYGON);
- xglColor3f(0.2109375, 0.23046875, 0.203125);
- xglVertex2f(275.625, 138.0);
- xglVertex2f(275.625, 148.125);
- xglVertex2f(258.125, 151.25);
- xglVertex2f(246.875, 151.25);
- xglVertex2f(226.875, 147.5);
- xglVertex2f(226.875, 138.0);
- xglVertex2f(275.625, 138.0);
- xglEnd();
-
- xglLoadIdentity();
-
- xglMatrixMode(GL_TEXTURE);
- xglPopMatrix();
- xglMatrixMode(GL_PROJECTION);
- xglPopMatrix();
- xglDisable(GL_TEXTURE_2D);
- xglDisable(GL_NORMALIZE);
- xglDisable(GL_LIGHTING);
- xglDisable(GL_LIGHT1);
- xglEnable(GL_LIGHT0);
-}
-
-// fgHorizonInit - initialize values for the AH
-
-void FGHorizon::Init(void){
- radius = 28.9;
- texXPos = 56;
- texYPos = 174;
- bottom = 36.5;
- top = 36.5;
- int n;
-
- float step = (360*DEG_TO_RAD)/180;
-
- for(n=0;n<180;n++){
- vertices[n][0] = cos(n * step) * radius;
- vertices[n][1] = sin(n * step) * radius;
- texCoord[n][0] = (cos(n * step) * radius)/256;
- texCoord[n][1] = (sin(n * step) * radius)/256;
- normals[n][0] = cos(n * step) * radius + sin(n * step);
- normals[n][1] = sin(n * step) * radius + cos(n * step);
- normals[n][2] = 0.0;
- }