diff options
Diffstat (limited to 'draw.c')
| -rw-r--r-- | draw.c | 134 |
1 files changed, 86 insertions, 48 deletions
@@ -1,3 +1,5 @@ +// Thanks to PierrotLL for MonochromeLib! I took some functions and modified them a bit.
+
#include "global.h"
#include "draw.h"
#include "sprites.h"
@@ -5,8 +7,10 @@ #include "key.h"
#include "syscalls.h"
+// options, this can speed up the rendering
int drawfloor = FALSE, drawheight = TRUE, drawtex = TRUE;
+// fast drawing function for horizontal lines
void horizontal(int y, int x1, int x2)
{
int checker, i;
@@ -23,6 +27,7 @@ void horizontal(int y, int x1, int x2) else vram[(y<<4)+(x1>>3)] |= (255>>(x1%8 + 7-x2%8))<<(7-(x2&7));
}
+// fills a box using horizontal
void fillbox(int x1, int y1, int x2, int y2)
{
int i;
@@ -42,11 +47,13 @@ void fillbox(int x1, int y1, int x2, int y2) horizontal(i, x1, x2);
}
+// a printmini in locate-like lines (1 to 7, but small chars)
void locatePrintMini(int x, int y, const uchar *text)
{
PrintMini((x - 2) * 6, (y - 2) * 8, text, 0);
}
+// draws a generated map, only used in generation before the main game
void drawgenmap()
{
int x, y;
@@ -57,35 +64,42 @@ void drawgenmap() {
if(map[x][y] == WALL || map[x][y] == CHECKED)
{
+ // draws a filled box wherever a wall is or could be
fillbox(x * sizex, y * sizey, (x + 1) * sizex, (y + 1) * sizey);
}
}
}
}
+// draws the map in the main game, including items
void showmap()
{
int x, y, exit = FALSE;
- int windowx = player.x, windowy = player.x, zoom = 8;
- const char plsprite = 0xA9;
- int lastkey, thiskey = 0;
+ int windowx = player.x, windowy = player.x, zoom = 8; // variables for scrolling
+ const char plsprite = 0xA9; // player's icon
+ int lastkey, thiskey = 0; // hold the pressed keys for a better movement
+
do
{
- int skew = 64 / zoom;
+ int skew = 64 / zoom; // factor for zooming
while(windowx + zoom * 2 >= MAPSIZE)
{
- windowx--;
+ windowx--; // if the window is outside of the map
}
+ // clear display
clear_vram();
+ // draw all static blocks
for(x = windowx; x < windowx + zoom * 2; x++)
{
for(y = windowy; y < windowy + zoom; y++)
{
+ // draw every square that is in the bounds of the viewer
if(map[x][y] != SPACE)
{
+ // if there is something, draw it
fillbox((x - windowx) * skew, (y - windowy) * skew, (x + 1 - windowx) * skew, (y + 1 - windowy) * skew);
switch(map[x][y])
{
@@ -97,11 +111,13 @@ void showmap() }
else if(x == (int)player.x && y == (int)player.y)
{
+ // the player gets a nice icon
PrintMini((player.x - windowx) * skew + 1, (player.y - windowy) * skew, &plsprite, MINI_OVER);
}
}
}
+ // draw sprites
for(x = 0; x < spritecnt; x++)
{
if(sprites[x].x >= windowx && sprites[x].x < windowx + zoom * 2 && sprites[x].y >= windowy && sprites[x].y < windowy + zoom)
@@ -109,17 +125,21 @@ void showmap() switch(sprites[x].type)
{
case TYPE_ENEMY:
+ // it's an enemy
PrintMini((sprites[x].x - windowx) * skew, (sprites[x].y - windowy) * skew, "!", MINI_OVER);
break;
case TYPE_PACK:
+ // health pack
PrintMini((sprites[x].x - windowx) * skew, (sprites[x].y - windowy) * skew, "+", MINI_OVER);
break;
}
}
}
+ // refresh
display_vram();
+ // emulate a GetKey-like speeding up on hold
keyupdate();
if(lastkey != thiskey)
@@ -133,7 +153,9 @@ void showmap() lastkey = thiskey;
- if(keydown(KEY_CTRL_EXIT))exit = TRUE;
+ if(keydown(KEY_CTRL_EXIT)) exit = TRUE; // back to the game
+
+ // move the window
if(keydown(KEY_CTRL_UP) && windowy > 0)
{
windowy--;
@@ -154,6 +176,8 @@ void showmap() windowx++;
thiskey = KEY_CTRL_RIGHT;
}
+
+ // zoom in and out
if(keydown(KEY_CHAR_PLUS) && zoom > 1)
{
zoom--;
@@ -167,18 +191,22 @@ void showmap() }while(exit == FALSE);
}
+// draws the gun on the bottom of the screen
void drawgun()
{
int i,u;
const int y = 47 + player.gunpos;
+ // depending on the weapon, but both are 21 x 22
+ // this could be improved, but it is ok like this
for(i = 0; i < 21; i++)
{
for(u = 0; u < 22; u++)
{
if(y + u <= 64)
{
+ // 0 = transparent, 1 = black, 2 = white
switch(player.weapon)
{
case GUN:
@@ -214,15 +242,20 @@ void drawgun() }
}
+// draw a vertical stripe using textures if wanted
+// args: x coord, x in texture, lower side's y, upper side's y, type of sprite, color (inversed or not)
+// if steps are given, use them; otherwise we get problems with the floor or ceiling
void vertical(int x, int tex, int start, int end, int type, int color, float steps)
{
int y = start;
int pos = 1 << 7, step;
-
+
+ // this fastens the progress
uchar xbyte = x & 7;
uchar shiftbyte = (128 >> xbyte);
uchar *buffpos = (unsigned char*)(vram + (x >> 3));
-
+
+ // do we need to draw textures?
if(drawtex == FALSE && type == 1)
{
if(start > end)
@@ -238,6 +271,7 @@ void vertical(int x, int tex, int start, int end, int type, int color, float ste pixel(x,start);
}
+ // swap the end and start to draw from top down
if(start > end)
{
int tmp = start;
@@ -245,55 +279,59 @@ void vertical(int x, int tex, int start, int end, int type, int color, float ste end = tmp;
}
+ // for every type of sprite use different textures
switch(type)
{
- case 1 :
- if(steps == 0)
- step = (16 << 8) / (end - start);
- else
- step = (16.0 / steps) * 128.0;
-
- for(; y < end;pos += step, y++)
- {
- if(wall[color][pos >> 8][(int)(tex >> 2)] == 1)
- (*(buffpos + (y << 4))) |= ((1 << 7) >> xbyte);
- /*else
- (*(buffpos + (y << 4))) &= ~((1 << 7) >> xbyte);*/
- }
- break;
+ case WALL:
+ // bitshifts are _lots_ faster than floats!
+ if(steps == 0)
+ step = (16 << 8) / (end - start);
+ else
+ step = (16.0 / steps) * 128.0;
- case 2 :
- if(steps == 0)
- step = (16 << 8) / (end - start);
- else
- step = (16.0 / steps) * 128.0;
-
- for(; y < end;pos += step, y ++)
- {
- (*(buffpos + (y << 4))) |= ((door[pos >> 8][(int)(tex >> 2)] << 7) >> xbyte);
- }
- break;
+ for(; y < end;pos += step, y++)
+ {
+ if(wall[color][pos >> 8][(int)(tex >> 2)] == 1)
+ (*(buffpos + (y << 4))) |= ((1 << 7) >> xbyte);
+
+ /*else
+ (*(buffpos + (y << 4))) &= ~((1 << 7) >> xbyte);*/
+ }
+ break;
- case 3 :
- if(steps == 0)
- step = (8 << 8) / (end - start);
- else
- step = (8.0 / steps) * 128.0;
-
- for(; y < end;pos += step, y ++)
- {
- if(pack[pos >> 8][(int)(tex >> 3)] == 1)
+ case DOOR:
+ if(steps == 0)
+ step = (16 << 8) / (end - start);
+ else
+ step = (16.0 / steps) * 128.0;
+
+ for(; y < end;pos += step, y ++)
{
- (*(buffpos + (y << 4))) |= shiftbyte;
+ (*(buffpos + (y << 4))) |= ((door[pos >> 8][(int)(tex >> 2)] << 7) >> xbyte);
}
+ break;
+
+ case 3 :
+ // this is a health packet
+ if(steps == 0)
+ step = (8 << 8) / (end - start);
else
+ step = (8.0 / steps) * 128.0;
+
+ for(; y < end;pos += step, y ++)
{
- if(pack[pos >> 8][(int)(tex >> 3)] == 2)
+ if(pack[pos >> 8][(int)(tex >> 3)] == 1)
+ {
+ (*(buffpos + (y << 4))) |= shiftbyte;
+ }
+ else
{
- (*(buffpos + (y << 4))) &= ( ~shiftbyte);
- }
+ if(pack[pos >> 8][(int)(tex >> 3)] == 2)
+ {
+ (*(buffpos + (y << 4))) &= ( ~shiftbyte);
+ }
+ }
}
- }
- break;
+ break;
}
}
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