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244 lines
6 KiB
C++
244 lines
6 KiB
C++
/* copyright (c) 2007 magnus auvinen, see licence.txt for more info */
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#include <engine/e_client_interface.h>
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#include "../g_math.h"
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#include "gc_client.h"
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void render_eval_envelope(ENVPOINT *points, int num_points, int channels, float time, float *result)
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{
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if(num_points == 0)
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{
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result[0] = 0;
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result[1] = 0;
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result[2] = 0;
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result[3] = 0;
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return;
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}
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if(num_points == 1)
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{
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result[0] = fx2f(points[0].values[0]);
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result[1] = fx2f(points[0].values[1]);
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result[2] = fx2f(points[0].values[2]);
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result[3] = fx2f(points[0].values[3]);
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return;
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}
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time = fmod(time, points[num_points-1].time/1000.0f)*1000.0f;
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for(int i = 0; i < num_points-1; i++)
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{
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if(time >= points[i].time && time <= points[i+1].time)
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{
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float delta = points[i+1].time-points[i].time;
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float a = (time-points[i].time)/delta;
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if(points[i].curvetype == CURVETYPE_SMOOTH)
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a = -2*a*a*a + 3*a*a; // second hermite basis
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else if(points[i].curvetype == CURVETYPE_SLOW)
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a = a*a*a;
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else if(points[i].curvetype == CURVETYPE_FAST)
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{
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a = 1-a;
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a = 1-a*a*a;
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}
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else if (points[i].curvetype == CURVETYPE_STEP)
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a = 0;
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else
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{
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// linear
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}
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for(int c = 0; c < channels; c++)
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{
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float v0 = fx2f(points[i].values[c]);
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float v1 = fx2f(points[i+1].values[c]);
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result[c] = v0 + (v1-v0) * a;
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}
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return;
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}
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}
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result[0] = fx2f(points[num_points-1].values[0]);
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result[1] = fx2f(points[num_points-1].values[1]);
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result[2] = fx2f(points[num_points-1].values[2]);
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result[3] = fx2f(points[num_points-1].values[3]);
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return;
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}
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static void rotate(POINT *center, POINT *point, float rotation)
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{
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int x = point->x - center->x;
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int y = point->y - center->y;
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point->x = (int)(x * cosf(rotation) - y * sinf(rotation) + center->x);
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point->y = (int)(x * sinf(rotation) + y * cosf(rotation) + center->y);
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}
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void render_quads(QUAD *quads, int num_quads, void (*eval)(float time_offset, int env, float *channels))
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{
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gfx_quads_begin();
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float conv = 1/255.0f;
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for(int i = 0; i < num_quads; i++)
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{
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QUAD *q = &quads[i];
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gfx_quads_setsubset_free(
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fx2f(q->texcoords[0].x), fx2f(q->texcoords[0].y),
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fx2f(q->texcoords[1].x), fx2f(q->texcoords[1].y),
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fx2f(q->texcoords[2].x), fx2f(q->texcoords[2].y),
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fx2f(q->texcoords[3].x), fx2f(q->texcoords[3].y)
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);
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float r=1, g=1, b=1, a=1;
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float offset_x = 0;
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float offset_y = 0;
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float rot = 0;
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// TODO: fix this
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if(q->pos_env >= 0)
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{
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float channels[4];
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eval(q->pos_env_offset/1000.0f, q->pos_env, channels);
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offset_x = channels[0];
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offset_y = channels[1];
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rot = channels[2];
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}
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if(q->color_env >= 0)
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{
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float channels[4];
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eval(q->color_env_offset/1000.0f, q->color_env, channels);
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r = channels[0];
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g = channels[1];
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b = channels[2];
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a = channels[3];
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}
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gfx_setcolorvertex(0, q->colors[0].r*conv*r, q->colors[0].g*conv*g, q->colors[0].b*conv*b, q->colors[0].a*conv*a);
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gfx_setcolorvertex(1, q->colors[1].r*conv*r, q->colors[1].g*conv*g, q->colors[1].b*conv*b, q->colors[1].a*conv*a);
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gfx_setcolorvertex(2, q->colors[2].r*conv*r, q->colors[2].g*conv*g, q->colors[2].b*conv*b, q->colors[2].a*conv*a);
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gfx_setcolorvertex(3, q->colors[3].r*conv*r, q->colors[3].g*conv*g, q->colors[3].b*conv*b, q->colors[3].a*conv*a);
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POINT *points = q->points;
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if(rot != 0)
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{
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static POINT rotated[4];
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rotated[0] = q->points[0];
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rotated[1] = q->points[1];
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rotated[2] = q->points[2];
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rotated[3] = q->points[3];
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points = rotated;
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rotate(&q->points[4], &rotated[0], rot);
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rotate(&q->points[4], &rotated[1], rot);
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rotate(&q->points[4], &rotated[2], rot);
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rotate(&q->points[4], &rotated[3], rot);
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}
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gfx_quads_draw_freeform(
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fx2f(points[0].x)+offset_x, fx2f(points[0].y)+offset_y,
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fx2f(points[1].x)+offset_x, fx2f(points[1].y)+offset_y,
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fx2f(points[2].x)+offset_x, fx2f(points[2].y)+offset_y,
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fx2f(points[3].x)+offset_x, fx2f(points[3].y)+offset_y
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);
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}
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gfx_quads_end();
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}
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void render_tilemap(TILE *tiles, int w, int h, float scale, vec4 color, int flags)
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{
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//gfx_texture_set(img_get(tmap->image));
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float screen_x0, screen_y0, screen_x1, screen_y1;
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gfx_getscreen(&screen_x0, &screen_y0, &screen_x1, &screen_y1);
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// calculate the final pixelsize for the tiles
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float tile_pixelsize = 1024/32.0f;
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float final_tilesize = scale/(screen_x1-screen_x0) * gfx_screenwidth();
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float final_tilesize_scale = final_tilesize/tile_pixelsize;
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gfx_quads_begin();
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gfx_setcolor(color.r, color.g, color.b, color.a);
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int starty = (int)(screen_y0/scale)-1;
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int startx = (int)(screen_x0/scale)-1;
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int endy = (int)(screen_y1/scale)+1;
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int endx = (int)(screen_x1/scale)+1;
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// adjust the texture shift according to mipmap level
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float texsize = 1024.0f;
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float frac = (1.25f/texsize) * (1/final_tilesize_scale);
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float nudge = (0.5f/texsize) * (1/final_tilesize_scale);
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for(int y = starty; y < endy; y++)
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for(int x = startx; x < endx; x++)
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{
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int mx = x;
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int my = y;
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if(flags)
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{
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if(mx<0)
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mx = 0;
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if(mx>=w)
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mx = w-1;
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if(my<0)
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my = 0;
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if(my>=h)
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my = h-1;
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}
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else
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{
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if(mx<0)
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continue; // mx = 0;
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if(mx>=w)
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continue; // mx = w-1;
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if(my<0)
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continue; // my = 0;
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if(my>=h)
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continue; // my = h-1;
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}
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int c = mx + my*w;
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unsigned char index = tiles[c].index;
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if(index)
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{
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unsigned char flags = tiles[c].flags;
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int tx = index%16;
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int ty = index/16;
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int px0 = tx*(1024/16);
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int py0 = ty*(1024/16);
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int px1 = (tx+1)*(1024/16)-1;
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int py1 = (ty+1)*(1024/16)-1;
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float u0 = nudge + px0/texsize+frac;
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float v0 = nudge + py0/texsize+frac;
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float u1 = nudge + px1/texsize-frac;
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float v1 = nudge + py1/texsize-frac;
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if(flags&TILEFLAG_VFLIP)
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{
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float tmp = u0;
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u0 = u1;
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u1 = tmp;
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}
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if(flags&TILEFLAG_HFLIP)
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{
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float tmp = v0;
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v0 = v1;
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v1 = tmp;
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}
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gfx_quads_setsubset(u0,v0,u1,v1);
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gfx_quads_drawTL(x*scale, y*scale, scale, scale);
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}
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}
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gfx_quads_end();
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}
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