From 0c9e624f86b589e71cfdf33ed453a9571f80ed45 Mon Sep 17 00:00:00 2001
From: kitty piapiac <kcp@bsd.computer>
Date: Sun, 23 Apr 2023 22:38:00 -0700
Subject: add ghost blocks for soon-to-be placed

---
 core.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/core.c b/core.c
index 40f7621..db1f131 100644
--- a/core.c
+++ b/core.c
@@ -54,16 +54,16 @@ _ V tetro_bake(Tetro t){U8 i;vec2 a;
   glm_vec2_sub(t.pos,(vec2){GRID_X,GRID_Y},a),
   glm_vec2_div(a,(vec2){CELL_W,CELL_H},a);
   for(i=0;i<4;++i)grid[(U32)(a[1]+t.v[i][1])][(U32)(a[0]+t.v[i][0])]=t.i;}
-_ V tetro_draw_col(Tetro t,vec4 c){U8 i;vec2 a;vec2 z={CELL_W,CELL_H};
+_ V tetro_draw_col(Tetro t,vec4 c,U32 tex){U8 i;vec2 a;vec2 z={CELL_W,CELL_H};
   graph_shader_use(shader_tetro),
-  graph_tex_use(tex_cell_mino,0),
+  graph_tex_use(tex,0),
   graph_shader_setM4("proj",proj),
   graph_shader_setV4("col",c);
   for(i=0;i<4;++i){
     glm_vec2_mul(t.v[i],z,a),
     glm_vec2_add(t.pos,a,a),
     graph_quad(a,z);}}
-_ V tetro_draw(Tetro t){tetro_draw_col(t,tetros_col[t.i]);}
+_ V tetro_draw(Tetro t){tetro_draw_col(t,tetros_col[t.i],tex_cell_mino);}
 _ U8 tetro_in_floor(Tetro t){U8 i;U32 w,x;vec2 a;
   glm_vec2_sub(t.pos,(vec2){GRID_X,GRID_Y},a),
   glm_vec2_div(a,(vec2){CELL_W,CELL_H},a);
@@ -74,6 +74,7 @@ _ U8 tetro_in_wall(Tetro t){U8 i;U32 w,x;vec2 a;
   glm_vec2_div(a,(vec2){CELL_W,CELL_H},a);
   for(i=0;i<4;++i){w=a[1]+t.v[i][1],x=a[0]+t.v[i][0];Q(x>=GRID_W||x<0||w>=GRID_H||w<0,R 1)Q(-1!=grid[w][x],R 1)}
   R 0;}
+
 _ V tetro_trans(Tetro*t,vec2 m){
   glm_vec2_add(t->pos,m,t->pos);}
 _ V tetro_move(Tetro*t,F64 x){
@@ -91,6 +92,8 @@ _ V tetro_rot(Tetro*t,S8 c){Tetro u=*t;
   tetro_trans(&u,(vec2){CELL_W,0});    Q(!tetro_in_wall(u),*t=u;R)
   tetro_trans(&u,(vec2){-2*CELL_W,0}); Q(!tetro_in_wall(u),*t=u;R)}
 
+_ V tetro_soon(Tetro*t){WH(!tetro_in_floor(*t),t->pos[1]-=CELL_H)t->pos[1]+=CELL_H;}
+
 _ Tetro bag[14];
 _ U8 bag_i=14;
 _ V tetro_next(Tetro*t){U8 i,j;Tetro u;
@@ -114,7 +117,7 @@ _ V grid_draw(V){U8 i,j;S8 c;vec2 z={CELL_W,CELL_H},pos={GRID_X,GRID_Y};
         graph_shader_setV4("col",tetros_col[c]);
       graph_quad(pos,z);}}
 
-_ Tetro held;
+_ Tetro held,soon;
 V core_init(V){
   glm_ortho(0,graph_win_w,0,graph_win_h,0,4,proj),
   srand(time(0)),
@@ -126,6 +129,8 @@ V core_init(V){
   tetro_next(&held);}
 V core_tick(InputPoint p,InputButtons b,F64 dt){_ F64 et=0;
   glm_ortho(0,graph_win_w,0,graph_win_h,0,4,proj);
+  soon=held,tetro_soon(&soon);
+  tetro_draw_col(soon,tetros_col[soon.i],tex_cell_soon);
   grid_draw();
   tetro_draw(held);
   Q((et+=dt)>=DELAY_FALL,tetro_fall(&held,et),et=0)
-- 
cgit v1.2.3