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pixelcity/World.cpp

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/*-----------------------------------------------------------------------------
World.cpp
2009 Shamus Young
-------------------------------------------------------------------------------
This holds a bunch of variables used by the other modules. It has the
claim system, which tracks all of the "property" is being used: As roads,
buildings, etc.
-----------------------------------------------------------------------------*/
#define HUE_COUNT (sizeof(hue_list)/sizeof(float))
#define LIGHT_COLOR_COUNT (sizeof(light_colors)/sizeof(HSL))
#include <windows.h>
#include <gl\gl.h>
#include <gl\glu.h>
#include <gl\glaux.h>
#include <math.h>
#include <time.h>
#include "glTypes.h"
#include "building.h"
#include "car.h"
#include "deco.h"
#include "camera.h"
#include "light.h"
#include "macro.h"
#include "math.h"
#include "mesh.h"
#include "random.h"
#include "render.h"
#include "sky.h"
#include "texture.h"
#include "visible.h"
#include "win.h"
#include "world.h"
struct plot
{
int x;
int z;
int width;
int depth;
};
enum {
FADE_IDLE,
FADE_OUT,
FADE_WAIT,
FADE_IN,
};
struct HSL
{
float hue;
float sat;
float lum;
};
class CStreet
{
public:
int _x;
int _y;
int _width;
int _depth;
CMesh* _mesh;
CStreet (int x, int y, int width, int depth);
~CStreet();
void Render ();
};
static HSL light_colors[] =
{
0.04f, 0.9f, 0.93f, //Amber / pink
0.055f, 0.95f, 0.93f, //Slightly brighter amber
0.08f, 0.7f, 0.93f, //Very pale amber
0.07f, 0.9f, 0.93f, //Very pale orange
0.1f, 0.9f, 0.85f, //Peach
0.13f, 0.9f, 0.93f, //Pale Yellow
0.15f, 0.9f, 0.93f, //Yellow
0.17f, 1.0f, 0.85f, //Saturated Yellow
0.55f, 0.9f, 0.93f, //Cyan
0.55f, 0.9f, 0.93f, //Cyan - pale, almost white
0.6f, 0.9f, 0.93f, //Pale blue
0.65f, 0.9f, 0.93f, //Pale Blue II, The Palening
0.65f, 0.4f, 0.99f, //Pure white. Bo-ring.
0.65f, 0.0f, 0.8f, //Dimmer white.
0.65f, 0.0f, 0.6f, //Dimmest white.
};
static float hue_list[] = { 0.04f, 0.07f, 0.1f, 0.5f, 0.6f }; //Yellows and blues - good for lights
static GLrgba bloom_color;
static long last_update;
static char world[WORLD_SIZE][WORLD_SIZE];
static CSky* sky;
static int fade_state;
static unsigned fade_start;
static float fade_current;
static int modern_count;
static int tower_count;
static int blocky_count;
static bool reset_needed;
static int skyscrapers;
static GLbbox hot_zone;
static unsigned start_time;
static int logo_index;
/*-----------------------------------------------------------------------------
-----------------------------------------------------------------------------*/
static GLrgba get_light_color (float sat, float lum)
{
int index;
index = RandomVal (LIGHT_COLOR_COUNT);
return glRgbaFromHsl (light_colors[index].hue, sat, lum);
}
/*-----------------------------------------------------------------------------
-----------------------------------------------------------------------------*/
static void claim (int x, int y, int width, int depth, int val)
{
int xx, yy;
for (xx = x; xx < (x + width); xx++) {
for (yy = y; yy < (y + depth); yy++) {
world[CLAMP (xx,0,WORLD_SIZE - 1)][CLAMP (yy,0,WORLD_SIZE - 1)] |= val;
}
}
}
/*-----------------------------------------------------------------------------
-----------------------------------------------------------------------------*/
static bool claimed (int x, int y, int width, int depth)
{
int xx, yy;
for (xx = x; xx < x + width; xx++) {
for (yy = y; yy < y + depth; yy++) {
if (world[CLAMP (xx,0,WORLD_SIZE - 1)][CLAMP (yy,0,WORLD_SIZE - 1)])
return true;
}
}
return false;
}
/*-----------------------------------------------------------------------------
-----------------------------------------------------------------------------*/
static void build_road (int x1, int y1, int width, int depth)
{
int lanes;
int divider;
int sidewalk;
//the given rectangle defines a street and its sidewalk. See which way it goes.
if (width > depth)
lanes = depth;
else
lanes = width;
//if we dont have room for both lanes and sidewalk, abort
if (lanes < 4)
return;
//if we have an odd number of lanes, give the extra to a divider.
if (lanes % 2) {
lanes--;
divider = 1;
} else
divider = 0;
//no more than 10 traffic lanes, give the rest to sidewalks
sidewalk = MAX (2, (lanes - 10));
lanes -= sidewalk;
sidewalk /= 2;
//take the remaining space and give half to each direction
lanes /= 2;
//Mark the entire rectangle as used
claim (x1, y1, width, depth, CLAIM_WALK);
//now place the directional roads
if (width > depth) {
claim (x1, y1 + sidewalk, width, lanes, CLAIM_ROAD | MAP_ROAD_WEST);
claim (x1, y1 + sidewalk + lanes + divider, width, lanes, CLAIM_ROAD | MAP_ROAD_EAST);
} else {
claim (x1 + sidewalk, y1, lanes, depth, CLAIM_ROAD | MAP_ROAD_SOUTH);
claim (x1 + sidewalk + lanes + divider, y1, lanes, depth, CLAIM_ROAD | MAP_ROAD_NORTH);
}
}
/*-----------------------------------------------------------------------------
-----------------------------------------------------------------------------*/
static plot find_plot (int x, int z)
{
plot p;
int x1, x2, z1, z2;
//We've been given the location of an open bit of land, but we have no
//idea how big it is. Find the boundary.
x1 = x2 = x;
while (!claimed (x1 - 1, z, 1, 1) && x1 > 0)
x1--;
while (!claimed (x2 + 1, z, 1, 1) && x2 < WORLD_SIZE)
x2++;
z1 = z2 = z;
while (!claimed (x, z1 - 1, 1, 1) && z1 > 0)
z1--;
while (!claimed (x, z2 + 1, 1, 1) && z2 < WORLD_SIZE)
z2++;
p.width = (x2 - x1);
p.depth = (z2 - z1);
p.x = x1;
p.z = z1;
return p;
}
/*-----------------------------------------------------------------------------
-----------------------------------------------------------------------------*/
static plot make_plot (int x, int z, int width, int depth)
{
plot p = {x, z, width, depth};
return p;
}
/*-----------------------------------------------------------------------------
-----------------------------------------------------------------------------*/
void do_building (plot p)
{
int height;
int seed;
int area;
int type;
GLrgba color;
bool square;
//now we know how big the rectangle plot is.
area = p.width * p.depth;
color = WorldLightColor (RandomVal ());
seed = RandomVal ();
//Make sure the plot is big enough for a building
if (p.width < 10 || p.depth < 10)
return;
//If the area is too big for one building, sub-divide it.
if (area > 600) {
if (p.width > p.depth) {
p.width /= 2;
if (COIN_FLIP)
do_building (make_plot (p.x, p.z, p.width, p.depth));
else
do_building (make_plot (p.x + p.width, p.z, p.width, p.depth));
return;
} else {
p.depth /= 2;
if (COIN_FLIP)
do_building (make_plot (p.x, p.z, p.width, p.depth));
else
do_building (make_plot (p.x, p.z + p.depth, p.width, p.depth));
return;
}
}
if (area < 100)
return;
//The plot is "square" if width & depth are close
square = abs (p.width - p.depth) < 10;
//mark the land as used so other buildings don't appear here, even if we don't use it all.
claim (p.x, p.z, p.width, p.depth, CLAIM_BUILDING);
//The roundy mod buildings look best on square plots.
if (square && p.width > 20) {
height = 45 + RandomVal (10);
modern_count++;
skyscrapers++;
new CBuilding (BUILDING_MODERN, p.x, p.z, height, p.width, p.depth, seed, color);
return;
}
//This spot isn't ideal for any particular building, but try to keep a good mix
if (tower_count < modern_count && tower_count < blocky_count) {
type = BUILDING_TOWER;
tower_count++;
} else if (blocky_count < modern_count) {
type = BUILDING_BLOCKY;
blocky_count++;
} else {
type = BUILDING_MODERN;
modern_count++;
}
height = 45 + RandomVal (10);
new CBuilding (type, p.x, p.z, height, p.width, p.depth, seed, color);
skyscrapers++;
}
/*-----------------------------------------------------------------------------
-----------------------------------------------------------------------------*/
static int build_light_strip (int x1, int z1, int direction)
{
CDeco* d;
GLrgba color;
int x2, z2;
int length;
int width, depth;
int dir_x, dir_z;
float size_adjust;
//We adjust the size of the lights with this.
size_adjust = 2.5f;
color = glRgbaFromHsl (0.09f, 0.99f, 0.85f);
switch (direction) {
case NORTH:
dir_z = 1; dir_x = 0;break;
case SOUTH:
dir_z = 1; dir_x = 0;break;
case EAST:
dir_z = 0; dir_x = 1;break;
case WEST:
dir_z = 0; dir_x = 1;break;
}
//So we know we're on the corner of an intersection
//look in the given until we reach the end of the sidewalk
x2 = x1;
z2 = z1;
length = 0;
while (x2 > 0 && x2 < WORLD_SIZE && z2 > 0 && z2 < WORLD_SIZE) {
if ((world[x2][z2] & CLAIM_ROAD))
break;
length++;
x2 += dir_x;
z2 += dir_z;
}
if (length < 10)
return length;
width = MAX (abs(x2 - x1), 1);
depth = MAX (abs(z2 - z1), 1);
d = new CDeco;
if (direction == EAST)
d->CreateLightStrip ((float)x1, (float)z1 - size_adjust, (float)width, (float)depth + size_adjust, 2, color);
else if (direction == WEST)
d->CreateLightStrip ((float)x1, (float)z1, (float)width, (float)depth + size_adjust, 2, color);
else if (direction == NORTH)
d->CreateLightStrip ((float)x1, (float)z1, (float)width + size_adjust, (float)depth, 2, color);
else
d->CreateLightStrip ((float)x1 - size_adjust, (float)z1, (float)width + size_adjust, (float)depth, 2, color);
return length;
}
/*-----------------------------------------------------------------------------
-----------------------------------------------------------------------------*/
static void do_reset (void)
{
int x, y;
int width, depth, height;
int attempts;
bool broadway_done;
bool road_left, road_right;
GLrgba light_color;
GLrgba building_color;
float west_street, north_street, east_street, south_street;
//Re-init Random to make the same city each time. Helpful when running tests.
//RandomInit (6);
reset_needed = false;
broadway_done = false;
skyscrapers = 0;
logo_index = 0;
tower_count = blocky_count = modern_count = 0;
hot_zone = glBboxClear ();
EntityClear ();
LightClear ();
CarClear ();
TextureReset ();
//Pick a tint for the bloom
bloom_color = get_light_color(0.5f + (float)RandomVal (10) / 20.0f, 0.75f);
light_color = glRgbaFromHsl (0.11f, 1.0f, 0.65f);
ZeroMemory (world, WORLD_SIZE * WORLD_SIZE);
for (y = WORLD_EDGE; y < WORLD_SIZE - WORLD_EDGE; y += RandomVal (30) + 20) {
if (!broadway_done && y > WORLD_HALF - 20) {
build_road (0, y, WORLD_SIZE, 19);
y += 20;
broadway_done = true;
} else {
depth = 6 + RandomVal (6);
if (y < WORLD_HALF / 2)
north_street = (float)(y + depth / 2);
if (y < (WORLD_SIZE - WORLD_HALF / 2))
south_street = (float)(y + depth / 2);
build_road (0, y, WORLD_SIZE, depth);
}
}
broadway_done = false;
for (x = WORLD_EDGE; x < WORLD_SIZE - WORLD_EDGE; x += RandomVal (30) + 20) {
if (!broadway_done && x > WORLD_HALF - 20) {
build_road (x, 0, 19, WORLD_SIZE);
x += 20;
broadway_done = true;
} else {
width = 6 + RandomVal (6);
if (x <= WORLD_HALF / 2)
west_street = (float)(x + width / 2);
if (x <= WORLD_HALF + WORLD_HALF / 2)
east_street = (float)(x + width / 2);
build_road (x, 0, width, WORLD_SIZE);
}
}
//We kept track of the positions of streets that will outline the high-detail hot zone
//in the middle of the world. Save this in a bounding box so that later we can
//have the camera fly around without clipping through buildings.
hot_zone = glBboxContainPoint (hot_zone, glVector (west_street, 0.0f, north_street));
hot_zone = glBboxContainPoint (hot_zone, glVector (east_street, 0.0f, south_street));
//Scan for places to put runs of streetlights on the east & west side of the road
for (x = 1; x < WORLD_SIZE - 1; x++) {
for (y = 0; y < WORLD_SIZE; y++) {
//if this isn't a bit of sidewalk, then keep looking
if (!(world[x][y] & CLAIM_WALK))
continue;
//If it's used as a road, skip it.
if ((world[x][y] & CLAIM_ROAD))
continue;
road_left = (world[x + 1][y] & CLAIM_ROAD) != 0;
road_right = (world[x - 1][y] & CLAIM_ROAD) != 0;
//if the cells to our east and west are not road, then we're not on a corner.
if (!road_left && !road_right)
continue;
//if the cell to our east AND west is road, then we're on a median. skip it
if (road_left && road_right)
continue;
y += build_light_strip (x, y, road_right ? SOUTH : NORTH);
}
}
//Scan for places to put runs of streetlights on the north & south side of the road
for (y = 1; y < WORLD_SIZE - 1; y++) {
for (x = 1; x < WORLD_SIZE - 1; x++) {
//if this isn't a bit of sidewalk, then keep looking
if (!(world[x][y] & CLAIM_WALK))
continue;
//If it's used as a road, skip it.
if ((world[x][y] & CLAIM_ROAD))
continue;
road_left = (world[x][y + 1] & CLAIM_ROAD) != 0;
road_right = (world[x][y - 1] & CLAIM_ROAD) != 0;
//if the cell to our east AND west is road, then we're on a median. skip it
if (road_left && road_right)
continue;
//if the cells to our north and south are not road, then we're not on a corner.
if (!road_left && !road_right)
continue;
x += build_light_strip (x, y, road_right ? EAST : WEST);
}
}
//Scan over the center area of the map and place the big buildings
attempts = 0;
while (skyscrapers < 50 && attempts < 350) {
x = (WORLD_HALF / 2) + (RandomVal () % WORLD_HALF);
y = (WORLD_HALF / 2) + (RandomVal () % WORLD_HALF);
if (!claimed (x, y, 1,1)) {
do_building (find_plot (x, y));
skyscrapers++;
}
attempts++;
}
//now blanket the rest of the world with lesser buildings
for (x = 0; x < WORLD_SIZE; x ++) {
for (y = 0; y < WORLD_SIZE; y ++) {
if (world[CLAMP (x,0,WORLD_SIZE)][CLAMP (y,0,WORLD_SIZE)])
continue;
width = 12 + RandomVal (20);
depth = 12 + RandomVal (20);
height = MIN (width, depth);
if (x < 30 || y < 30 || x > WORLD_SIZE - 30 || y > WORLD_SIZE - 30)
height = RandomVal (15) + 20;
else if (x < WORLD_HALF / 2)
height /= 2;
while (width > 8 && depth > 8) {
if (!claimed (x, y, width, depth)) {
claim (x, y, width, depth,CLAIM_BUILDING);
building_color = WorldLightColor (RandomVal ());
//if we're out of the hot zone, use simple buildings
if (x < hot_zone.min.x || x > hot_zone.max.x || y < hot_zone.min.z || y > hot_zone.max.z) {
height = 5 + RandomVal (height) + RandomVal (height);
new CBuilding (BUILDING_SIMPLE, x + 1, y + 1, height, width - 2, depth - 2, RandomVal (), building_color);
} else { //use fancy buildings.
height = 15 + RandomVal (15);
width -=2;
depth -=2;
if (COIN_FLIP)
new CBuilding (BUILDING_TOWER, x + 1, y + 1, height, width, depth, RandomVal (), building_color);
else
new CBuilding (BUILDING_BLOCKY, x + 1, y + 1, height, width, depth, RandomVal (), building_color);
}
break;
}
width--;
depth--;
}
//leave big gaps near the edge of the map, no need to pack detail there.
if (y < WORLD_EDGE || y > WORLD_SIZE - WORLD_EDGE)
y += 32;
}
//leave big gaps near the edge of the map
if (x < WORLD_EDGE || x > WORLD_SIZE - WORLD_EDGE)
x += 28;
}
}
/*-----------------------------------------------------------------------------
This will return a random color which is suitible for light sources, taken
from a narrow group of hues. (Yellows, oranges, blues.)
-----------------------------------------------------------------------------*/
GLrgba WorldLightColor (unsigned index)
{
index %= LIGHT_COLOR_COUNT;
return glRgbaFromHsl (light_colors[index].hue, light_colors[index].sat, light_colors[index].lum);
}
/*-----------------------------------------------------------------------------
-----------------------------------------------------------------------------*/
char WorldCell (int x, int y)
{
return world[CLAMP (x, 0,WORLD_SIZE - 1)][CLAMP (y, 0, WORLD_SIZE - 1)];
}
/*-----------------------------------------------------------------------------
-----------------------------------------------------------------------------*/
GLrgba WorldBloomColor ()
{
return bloom_color;
}
/*-----------------------------------------------------------------------------
-----------------------------------------------------------------------------*/
int WorldLogoIndex ()
{
return logo_index++;
}
/*-----------------------------------------------------------------------------
-----------------------------------------------------------------------------*/
GLbbox WorldHotZone ()
{
return hot_zone;
}
/*-----------------------------------------------------------------------------
-----------------------------------------------------------------------------*/
void WorldTerm (void)
{
}
/*-----------------------------------------------------------------------------
-----------------------------------------------------------------------------*/
void WorldReset (void)
{
//If we're already fading out, then this is the developer hammering on the
//"rebuild" button. Let's hurry things up for the nice man...
if (fade_state == FADE_OUT)
do_reset ();
//If reset is called but the world isn't ready, then don't bother fading out.
//The program probably just started.
fade_state = FADE_OUT;
fade_start = GetTickCount ();
}
/*-----------------------------------------------------------------------------
-----------------------------------------------------------------------------*/
void WorldRender ()
{
if (!SHOW_DEBUG_GROUND)
return;
//Render a single texture over the city that shows traffic lanes
glDepthMask (false);
glDisable (GL_CULL_FACE);
glDisable (GL_BLEND);
glEnable (GL_TEXTURE_2D);
glColor3f (1,1,1);
glBindTexture (GL_TEXTURE_2D, TextureId (TEXTURE_GROUND));
glBegin (GL_QUADS);
glTexCoord2f (0, 0); glVertex3f ( 0., 0, 0);
glTexCoord2f (0, 1); glVertex3f ( 0, 0, 1024);
glTexCoord2f (1, 1); glVertex3f ( 1024, 0, 1024);
glTexCoord2f (1, 0); glVertex3f ( 1024, 0, 0);
glEnd ();
glDepthMask (true);
}
/*-----------------------------------------------------------------------------
-----------------------------------------------------------------------------*/
float WorldFade (void)
{
return fade_current;
}
/*-----------------------------------------------------------------------------
-----------------------------------------------------------------------------*/
void WorldUpdate (void)
{
unsigned fade_delta;
unsigned now, elapsed;
now = GetTickCount ();
if (reset_needed) {
do_reset (); //Now we've faded out the scene, rebuild it
}
if (fade_state != FADE_IDLE) {
if (fade_state == FADE_WAIT && TextureReady () && EntityReady ()) {
fade_state = FADE_IN;
fade_start = now;
fade_current = 1.0f;
}
fade_delta = now - fade_start;
//See if we're done fading in or out
if (fade_delta > FADE_TIME && fade_state != FADE_WAIT) {
if (fade_state == FADE_OUT) {
reset_needed = true;
fade_state = FADE_WAIT;
fade_current = 1.0f;
} else {
fade_state = FADE_IDLE;
fade_current = 0.0f;
start_time = time (NULL);
}
} else {
fade_current = (float)fade_delta / FADE_TIME;
if (fade_state == FADE_IN)
fade_current = 1.0f - fade_current;
if (fade_state == FADE_WAIT)
fade_current = 1.0f;
}
if (!TextureReady ())
fade_current = 1.0f;
}
if (fade_state == FADE_IDLE && !TextureReady ()) {
fade_state = FADE_IN;
fade_start = now;
}
elapsed = time (NULL) - start_time;
if (fade_state == FADE_IDLE && elapsed > RESET_INTERVAL)
WorldReset ();
}
/*-----------------------------------------------------------------------------
-----------------------------------------------------------------------------*/
void WorldInit (void)
{
last_update = GetTickCount ();
for (int i = 0; i < CARS; i++)
new CCar ();
sky = new CSky ();
WorldReset ();
fade_state = FADE_OUT;
fade_start = 0;
}
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