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Trying to get fog to work ...

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This commit is contained in:
curt 1997-05-23 00:35:09 +00:00
parent a104d9c820
commit 1d7a109e9a
6 changed files with 131 additions and 132 deletions
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19
Main/GLUTkey.c
View file

@ -15,6 +15,7 @@
#include "GLUTkey.h"
#include "../aircraft/aircraft.h"
extern double fogDensity;
/* Handle keyboard events */
void GLUTkey(unsigned char k, int x, int y) {
@ -48,6 +49,17 @@ void GLUTkey(unsigned char k, int x, int y) {
return;
case 4:
c->throttle[0] += 0.05;
return;
case 122:
fogDensity *= 1.10;
glFogf(GL_FOG_DENSITY, fogDensity);
printf("Fog density = %.4f\n", fogDensity);
return;
case 90:
fogDensity /= 1.10;
glFogf(GL_FOG_DENSITY, fogDensity);
printf("Fog density = %.4f\n", fogDensity);
return;
case 27: /* ESC */
exit(0);
}
@ -56,9 +68,12 @@ void GLUTkey(unsigned char k, int x, int y) {
/* $Log$
/* Revision 1.1 1997/05/21 15:57:50 curt
/* Renamed due to added GLUT support.
/* Revision 1.2 1997/05/23 00:35:12 curt
/* Trying to get fog to work ...
/*
* Revision 1.1 1997/05/21 15:57:50 curt
* Renamed due to added GLUT support.
*
* Revision 1.2 1997/05/19 18:22:41 curt
* Parameter tweaking ... starting to stub in fog support.
*

99
Main/GLmain.c
View file

@ -44,26 +44,37 @@ static GLfloat win_ratio = 1.0;
/* pointer to terrain mesh structure */
static GLint mesh;
double fogDensity = 0.04;
/* init_view() -- Setup view parameters */
static void init_view() {
/* if the 4th field is 0.0, this specifies a direction ... */
static GLfloat pos[4] = {-3.0, 1.0, 3.0, 0.0 };
static GLfloat color[4] = { 0.3, 0.7, 0.2, 1.0 };
static GLfloat fogColor[4] = {0.5, 0.5, 0.5, 1.0};
glLightfv( GL_LIGHT0, GL_POSITION, pos );
glEnable( GL_DEPTH_TEST );
glEnable( GL_CULL_FACE );
/* If enabled, normal vectors specified with glNormal are scaled
to unit length after transformation. See glNormal. */
glEnable( GL_NORMALIZE );
glLightfv( GL_LIGHT0, GL_POSITION, pos );
glEnable( GL_LIGHTING );
glEnable( GL_LIGHT0 );
glEnable( GL_DEPTH_TEST );
glMaterialfv( GL_FRONT, GL_AMBIENT_AND_DIFFUSE, color );
glShadeModel( GL_FLAT ); /* glShadeModel( GL_SMOOTH ); */
glEnable( GL_FOG );
glFogi (GL_FOG_MODE, GL_LINEAR);
glFogi (GL_FOG_MODE, GL_EXP);
/* glFogf (GL_FOG_START, 1.0); */
glFogf (GL_FOG_END, 1000.0);
/* glFogf (GL_FOG_END, 1000.0); */
glFogfv (GL_FOG_COLOR, fogColor);
glFogf (GL_FOG_DENSITY, 0.04);
glHint(GL_FOG_HINT, GL_FASTEST);
glFogf (GL_FOG_DENSITY, fogDensity);
/* glHint (GL_FOG_HINT, GL_FASTEST); */
glClearColor(0.6, 0.6, 0.9, 1.0);
}
@ -73,10 +84,6 @@ static void init_scene() {
/* make terrain mesh */
mesh = make_mesh();
/* If enabled, normal vectors specified with glNormal are scaled
to unit length after transformation. See glNormal. */
glEnable( GL_NORMALIZE );
}
@ -90,50 +97,6 @@ GLint make_mesh() {
}
/* create the terrain mesh */
GLint make_mesh_old() {
GLint mesh;
static GLfloat color[4] = { 0.3, 0.7, 0.2, 1.0 };
mesh = glGenLists(1);
glNewList(mesh, GL_COMPILE);
glMaterialfv( GL_FRONT, GL_AMBIENT_AND_DIFFUSE, color );
glShadeModel( GL_FLAT ); /* glShadeModel( GL_SMOOTH ); */
glBegin(GL_POLYGON);
glVertex3f(-10.0, -10.0, 0.0);
glVertex3f(0.0, -10.0, 0.0);
glVertex3f(0.0, 0.0, 1.0);
glVertex3f(-10.0, 0.0, 1.0);
glEnd();
glBegin(GL_POLYGON);
glVertex3f(-10.0, 0.0, 1.0);
glVertex3f(0.0, 0.0, 1.0);
glVertex3f(0.0, 10.0, 0.0);
glVertex3f(-10.0, 10.0, 0.0);
glEnd();
glBegin(GL_POLYGON);
glVertex3f(0.0, 0.0, 0.0);
glVertex3f(10.0, 0.0, 2.0);
glVertex3f(10.0, 10.0, 2.0);
glVertex3f(0.0, 10.0, 0.0);
glEnd();
glBegin(GL_POLYGON);
glVertex3f(0.0, -10.0, -1.0);
glVertex3f(10.0, -10.0, 0.0);
glVertex3f(10.0, 0.0, -1.0);
glVertex3f(0.0, 0.0, 0.0);
glEnd();
glEndList();
return(mesh);
}
/* update the view volume */
static void update_view() {
struct flight_params *f;
@ -153,24 +116,18 @@ static void update_view() {
/* draw the scene */
static void draw_scene( void ) {
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
/* update view volume parameters */
update_view();
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
/* Tell GL we are switching to model view parameters */
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
/* glTranslatef(0.0, 0.0, -5.0); */
glPushMatrix();
/* draw terrain mesh */
draw_mesh();
glPopMatrix();
#ifdef GLUT
glutSwapBuffers();
#elif MESA_TK
@ -225,12 +182,12 @@ int main( int argc, char *argv[] ) {
/* initialize GLUT */
glutInit(&argc, argv);
/* Define initial window size */
glutInitWindowSize(640, 400);
/* Define Display Parameters */
glutInitDisplayMode( GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE );
/* Define initial window size */
glutInitWindowSize(640, 400);
/* Initialize the main window */
glutCreateWindow("Terrain Demo");
#elif MESA_TK
@ -254,7 +211,8 @@ int main( int argc, char *argv[] ) {
/* Set initial position and slew parameters */
/* slew_init(-398391.3, 120070.4, 244, 3.1415); */ /* GLOBE Airport */
slew_init(-398673.28,120625.64, 53, 4.38);
/* slew_init(-398673.28,120625.64, 53, 4.38); */
slew_init(0.0, 0.0, 53, 0.77);
#ifdef GLUT
/* call reshape() on window resizes */
@ -297,9 +255,12 @@ int main( int argc, char *argv[] ) {
/* $Log$
/* Revision 1.1 1997/05/21 15:57:51 curt
/* Renamed due to added GLUT support.
/* Revision 1.2 1997/05/23 00:35:12 curt
/* Trying to get fog to work ...
/*
* Revision 1.1 1997/05/21 15:57:51 curt
* Renamed due to added GLUT support.
*
* Revision 1.3 1997/05/19 18:22:42 curt
* Parameter tweaking ... starting to stub in fog support.
*

11
Main/Makefile
View file

@ -37,12 +37,12 @@ INTERFACE_FILES = GLUTkey.c
#---------------------------------------------------------------------------
# For OpenGL
GRAPHICS_LIBS = -lGLU -lGL -lXmu -lX11
# GRAPHICS_LIBS = -lGLU -lGL -lXmu -lX11
# For Mesa
# MESA_LIBS = -L/usr/lib/mesa -lMesaaux -lMesatk -lMesaGLU -lMesaGL
# X11_LIBS = -L/usr/X11R6/lib -lXext -lXmu -lXi -lX11
# GRAPHICS_LIBS = $(MESA_LIBS) $(X11_LIBS)
MESA_LIBS = -L/usr/lib/mesa -lMesaaux -lMesatk -lMesaGLU -lMesaGL
X11_LIBS = -L/usr/X11R6/lib -lXext -lXmu -lXi -lX11
GRAPHICS_LIBS = $(MESA_LIBS) $(X11_LIBS)
CFLAGS = $(STD_CFLAGS) $(INTERFACE_FLAGS)
@ -86,6 +86,9 @@ mesh2GL.o: mesh2GL.c ../scenery/mesh.h
#---------------------------------------------------------------------------
# $Log$
# Revision 1.3 1997/05/23 00:35:13 curt
# Trying to get fog to work ...
#
# Revision 1.2 1997/05/21 15:57:52 curt
# Renamed due to added GLUT support.
#

24
Main/mesh2GL.c
View file

@ -1,5 +1,5 @@
/**************************************************************************
* mesh2ogl.c -- walk through a mesh data structure and make ogl calls
* mesh2GL.c -- walk through a mesh data structure and make GL calls
*
* Written by Curtis Olson, started May 1997.
*
@ -37,28 +37,27 @@ static void mat3_cross_product(float result_vec[3], register float vec1[3],
/* walk through mesh and make ogl calls */
GLint mesh_to_ogl(struct mesh *m) {
GLint mesh;
static GLfloat color[4] = { 0.3, 0.7, 0.2, 1.0 };
/* static GLfloat color[4] = { 0.3, 0.7, 0.2, 1.0 }; */
float x1, y1, x2, y2, z11, z12, z21, z22;
float v1[3], v2[3], normal[3];
int i, j, istep, jstep, iend, jend;
float temp;
istep = jstep = 10; /* Detail level 1 -- 1200 ... */
istep = jstep = 25; /* Detail level 1 -- 1200 ... */
mesh = glGenLists(1);
glNewList(mesh, GL_COMPILE);
glMaterialfv( GL_FRONT, GL_AMBIENT_AND_DIFFUSE, color );
glShadeModel( GL_FLAT ); /* glShadeModel( GL_SMOOTH ); */
/* glMaterialfv( GL_FRONT, GL_AMBIENT_AND_DIFFUSE, color ); */
iend = m->cols - 1;
jend = m->rows - 1;
y1 = m->originy;
y1 = 0.0; /* y1 = m->originy; */
y2 = y1 + (m->col_step * istep);
for ( i = 0; i < iend; i += istep ) {
x1 = m->originx;
x1 = 0.0; /* x1 = m->originx; */
x2 = x1 + (m->row_step * jstep);
for ( j = 0; j < jend; j += jstep ) {
z11 = 0.03 * m->mesh_data[j * m->rows + i ];
@ -75,8 +74,8 @@ GLint mesh_to_ogl(struct mesh *m) {
v2[0] = x2 - x1; v2[1] = y2 - y1; v2[2] = z22 - z11;
mat3_cross_product(normal, v1, v2);
MAT3_NORMALIZE_VEC(normal,temp);
glNormal3fv(normal);
glBegin(GL_POLYGON);
glNormal3fv(normal);
glVertex3f(x1, y1, z11);
glVertex3f(x2, y1, z21);
glVertex3f(x2, y2, z22);
@ -89,8 +88,8 @@ GLint mesh_to_ogl(struct mesh *m) {
v2[0] = 0; v2[1] = y2 - y1; v2[2] = z12 - z11;
mat3_cross_product(normal, v1, v2);
MAT3_NORMALIZE_VEC(normal,temp);
glNormal3fv(normal);
glBegin(GL_POLYGON);
glNormal3fv(normal);
glVertex3f(x1, y1, z11);
glVertex3f(x2, y2, z22);
glVertex3f(x1, y2, z12);
@ -113,9 +112,12 @@ GLint mesh_to_ogl(struct mesh *m) {
/* $Log$
/* Revision 1.1 1997/05/21 15:57:52 curt
/* Renamed due to added GLUT support.
/* Revision 1.2 1997/05/23 00:35:13 curt
/* Trying to get fog to work ...
/*
* Revision 1.1 1997/05/21 15:57:52 curt
* Renamed due to added GLUT support.
*
* Revision 1.3 1997/05/19 18:22:42 curt
* Parameter tweaking ... starting to stub in fog support.
*

101
Scenery/scanner.l
View file

@ -19,14 +19,6 @@
/* custom print routine */
static int scanner_debug = 0;
static int scanner_msg_len;
static char scanner_msg[1024];
static void scanner_print(char *s) {
if ( scanner_debug ) {
printf("%s", s);
}
}
/* Routines to manage a stack of nested input buffers (for
processing the #include directive */
@ -100,87 +92,111 @@ other .
/* Rules */
%%
include { scanner_print("return IncludeSym\n");
include { if ( scanner_debug ) {
printf("return IncludeSym\n");
}
return IncludeSym;
}
mesh { scanner_print("return MeshSym\n");
mesh { if ( scanner_debug ) {
printf("return MeshSym\n");
}
return MeshSym;
}
row { scanner_print("return RowSym\n");
row { if ( scanner_debug ) {
printf("return RowSym\n");
}
return RowSym;
}
chunk { scanner_print("return ChunkSym\n");
chunk { if ( scanner_debug ) {
printf("return ChunkSym\n");
}
return ChunkSym;
}
bounds { scanner_print("return BoundsSym\n");
bounds { if ( scanner_debug ) {
printf("return BoundsSym\n");
}
return BoundsSym;
}
place { scanner_print("return PlaceSym\n");
place { if ( scanner_debug ) {
printf("return PlaceSym\n");
}
return PlaceSym;
}
{ident} { scanner_msg_len = snprintf(scanner_msg, 1024,
"return Identifier = %s\n", yytext);
scanner_msg[scanner_msg_len] = '\0';
scanner_print(scanner_msg);
{ident} { if ( scanner_debug ) {
printf("return Identifier = %s\n", yytext);
}
return Identifier;
}
{number} { scanner_print("return Number\n");
{number} { if ( scanner_debug ) {
printf("return Number\n");
}
return Number;
}
{string} { scanner_msg_len = snprintf(scanner_msg, 1024,
"return StringLiteral = %s\n", yytext);
scanner_msg[scanner_msg_len] = '\0';
scanner_print(scanner_msg);
{string} { if ( scanner_debug ) {
printf("return StringLiteral = %s\n", yytext);
}
return StringLiteral;
}
{bad_string} { scanner_msg_len = snprintf(scanner_msg, 1024,
"return BadStringLiteral = %s\n", yytext);
scanner_msg[scanner_msg_len] = '\0';
scanner_print(scanner_msg);
{bad_string} { if ( scanner_debug ) {
printf("return BadStringLiteral = %s\n", yytext);
}
return BadStringLiteral;
}
"\n" { line_num++;
scanner_msg_len = snprintf(scanner_msg, 1024,
"Line number = %d\n", line_num);
scanner_msg[scanner_msg_len] = '\0';
scanner_print(scanner_msg);
}
if ( scanner_debug ) {
printf("Line number = %d\n", line_num);
}
}
"#" { scanner_print("return HashSym\n");
"#" { if ( scanner_debug ) {
printf("return HashSym\n");
}
return HashSym;
}
"=" { scanner_print("return EqualSym\n");
"=" { if ( scanner_debug ) {
printf("return EqualSym\n");
}
return EqualSym;
}
"," { scanner_print("return CommaSym\n");
"," { if ( scanner_debug ) {
printf("return CommaSym\n");
}
return CommaSym;
}
"{" { scanner_print("return LBraceSym\n");
"{" { if ( scanner_debug ) {
printf("return LBraceSym\n");
}
return LBraceSym;
}
"}" { scanner_print("return RBraceSym\n");
"}" { if ( scanner_debug ) {
printf("return RBraceSym\n");
}
return RBraceSym;
}
"(" { scanner_print("return LParenSym\n");
"(" { if ( scanner_debug ) {
printf("return LParenSym\n");
}
return LParenSym;
}
")" { scanner_print("return RParenSym\n");
")" { if ( scanner_debug ) {
printf("return RParenSym\n");
}
return RParenSym;
}
@ -196,10 +212,9 @@ place { scanner_print("return PlaceSym\n");
{ws} { ; }
{other} { scanner_msg_len = snprintf(scanner_msg, 1024,
"Scanned some unexpected text = `%s'\n", yytext);
scanner_msg[scanner_msg_len] = '\0';
scanner_print(scanner_msg);
{other} { if ( scanner_debug ) {
printf("Scanned some unexpected text = `%s'\n", yytext);
}
return ErrorMisc;
}

9
Simulator/Makefile
View file

@ -12,18 +12,18 @@ CC = gcc
SUBDIRS = aircraft controls flight scenery
MAIN = gltk
MAIN = OpenGL
all:
for dir in $(SUBDIRS) $(MAIN); do \
( cd $$dir; make CC=$(CC) CFLAGS=$(CFLAGS) ) ; \
( cd $$dir; make CC=$(CC) ) ; \
done
install:
for dir in $(SUBDIRS) $(MAIN); do \
( cd $$dir; make CC=$(CC) CFLAGS=$(CFLAGS) install) ; \
( cd $$dir; make CC=$(CC) install) ; \
done
@ -36,6 +36,9 @@ clean:
#---------------------------------------------------------------------------
# $Log$
# Revision 1.2 1997/05/23 00:35:09 curt
# Trying to get fog to work ...
#
# Revision 1.1 1997/05/16 15:51:13 curt
# Initial revision.
#