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background.c
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background.c
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/*
* $Id: background.c 264 2005-11-06 17:43:44Z mrbrown $
*
* Copyright 2003 Kenta Cho. All rights reserved.
*/
/**
* Screen background.
*
* @version $Revision: 264 $
*/
#include "genmcr.h"
#include "background.h"
#include "screen.h"
#define PLANE_MAX 4
static Plane plane[PLANE_MAX];
static int planeNum;
void initBackground(int s) {
int i;
Plane *pl;
switch ( s ) {
case 0:
planeNum = 3;
for ( i=0 ; i<planeNum ; i++ ) {
pl = &(plane[i]);
pl->xn = 8; pl->yn = 16;
pl->width = 3.0f; pl->height = 2.0f;
pl->x = -pl->width*pl->xn/2;
pl->y = -pl->height*pl->yn/2;
pl->z = -10.0f;
pl->ox = pl->oy = 0;
switch ( i ) {
case 0:
pl->r = 250; pl->g = 200; pl->b = 20; pl->a = 100;
pl->d1 = 0;
pl->mx = 0; pl->my = 0.05;
break;
case 1:
pl->r = 200; pl->g = 150; pl->b = 20; pl->a = 50;
pl->d1 = 32;
pl->mx = 0.04; pl->my = 0.05;
break;
case 2:
pl->r = 200; pl->g = 150; pl->b = 20; pl->a = 50;
pl->d1 = -32&1023;
pl->mx = -0.04; pl->my = 0.05;
break;
}
}
break;
case 1:
planeNum = 2;
for ( i=0 ; i<planeNum ; i++ ) {
pl = &(plane[i]);
pl->xn = 8; pl->yn = 8;
pl->width = 3.0f; pl->height = 3.0f;
pl->x = -pl->width*pl->xn/2;
pl->y = -pl->height*pl->yn/2;
pl->z = -10.0f;
pl->ox = pl->oy = 0;
switch ( i ) {
case 0:
pl->r = 200; pl->g = 100; pl->b = 200; pl->a = 150;
pl->d1 = 4;
pl->mx = 0; pl->my = 0.12;
break;
case 1:
pl->r = 120; pl->g = 100; pl->b = 120; pl->a = 120;
pl->d1 = 4;
pl->mx = 0; pl->my = -0.05;
break;
}
}
break;
case 2:
planeNum = 3;
for ( i=0 ; i<planeNum ; i++ ) {
pl = &(plane[i]);
switch ( i ) {
case 0:
pl->xn = 6; pl->yn = 6;
pl->width = 5.0f; pl->height = 5.0f;
break;
case 1:
case 2:
pl->xn = 16; pl->yn = 16;
pl->width = 1.5f; pl->height = 1.5f;
break;
}
pl->x = -pl->width*pl->xn/2;
pl->y = -pl->height*pl->yn/2;
pl->z = -10.0f;
pl->ox = pl->oy = 0;
switch ( i ) {
case 0:
pl->r = 150; pl->g = 200; pl->b = 150; pl->a = 125;
pl->d1 = 0;
pl->mx = 0; pl->my = 0.04;
break;
case 1:
pl->r = 170; pl->g = 200; pl->b = 170; pl->a = 60;
pl->d1 = 0;
pl->mx = 0.01; pl->my = 0.01;
break;
case 2:
pl->r = 170; pl->g = 200; pl->b = 170; pl->a = 60;
pl->d1 = 0;
pl->mx = -0.01; pl->my = 0.01;
break;
}
}
break;
case 3:
planeNum = 4;
for ( i=0 ; i<planeNum ; i++ ) {
pl = &(plane[i]);
pl->xn = 8; pl->yn = 16;
pl->width = 4.0f; pl->height = 2.5f;
pl->x = -pl->width*pl->xn/2;
pl->y = -pl->height*pl->yn/2;
pl->z = -10.0f;
pl->ox = pl->oy = 0;
pl->r = 200; pl->g = 200; pl->b = 100;
switch ( i ) {
case 0:
pl->a = 72;
pl->d1 = 0;
pl->mx = -0.05; pl->my = 0.1;
break;
case 1:
pl->a = 40;
pl->d1 = 10;
pl->mx = -0.025; pl->my = 0;
break;
case 2:
pl->a = 40;
pl->d1 = -10;
pl->mx = 0.025; pl->my = 0;
break;
case 3:
pl->a = 72;
pl->d1 = 0;
pl->mx = -0.025; pl->my = 0.1;
break;
}
}
break;
}
}
void moveBackground() {
int i;
Plane *pl;
for ( i=0 ; i<planeNum ; i++ ) {
pl = &(plane[i]);
pl->ox -= pl->mx;
if ( pl->ox < 0 ) pl->ox += pl->width;
if ( pl->ox >= pl->width ) pl->ox -= pl->width;
pl->oy -= pl->my;
if ( pl->oy < 0 ) pl->oy += pl->height;
if ( pl->oy >= pl->height ) pl->oy -= pl->height;
}
}
void drawBackground() {
int lx, ly, i;
float x, y;
Plane *pl;
for ( i=0 ; i<planeNum ; i++ ) {
pl = &(plane[i]);
x = pl->x+pl->ox;
for ( lx=0 ; lx<pl->xn ; lx++, x+=pl->width ) {
drawRollLineAbs(x, pl->y+pl->oy, pl->z, x, pl->y+pl->oy+pl->height*pl->yn, pl->z,
pl->r, pl->g, pl->b, pl->a, pl->d1);
}
y = pl->y + pl->oy;
for ( ly=0 ; ly<pl->yn ; ly++, y+=pl->height ) {
drawRollLineAbs(pl->x+pl->ox, y, pl->z, pl->x+pl->ox+pl->width*pl->xn, y, pl->z,
pl->r, pl->g, pl->b, pl->a, pl->d1);
}
}
}