From 91441035b97f2fad3e677121b7f3849c7e51b949 Mon Sep 17 00:00:00 2001
From: kitty piapiac <kcp@bsd.computer>
Date: Sun, 23 Apr 2023 22:04:20 -0700
Subject: add collision on l/r movement

---
 core.c | 24 +++++++++++++++---------
 1 file changed, 15 insertions(+), 9 deletions(-)

diff --git a/core.c b/core.c
index 4e2b89e..ab99c35 100644
--- a/core.c
+++ b/core.c
@@ -72,6 +72,16 @@ _ V tetro_draw_col(Tetro t,vec4 c){U8 i;vec2 a;vec2 z={CELL_W,CELL_H};
     glm_vec2_add(t.pos,a,a),
     graph_quad(a,z);}}
 _ V tetro_draw(Tetro t){tetro_draw_col(t,tetros_col[t.i]);}
+_ 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);
+  for(i=0;i<4;++i){w=a[1]+t.v[i][1],x=a[0]+t.v[i][0];Q(w>=GRID_H||w<0,R 1)Q(-1!=grid[w][x],R 1)}
+  R 0;}
+_ U8 tetro_in_wall(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);
+  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,R 1)Q(-1!=grid[w][x],R 1)}
+  R 0;}
 
 _ Tetro bag[14];
 _ U8 bag_i=14;
@@ -79,15 +89,13 @@ _ V tetro_next(Tetro*t){U8 i,j;Tetro u;
   Q(bag_i>=13,bag_i=0,memcpy(bag,tetros,SZ tetros),memcpy(bag+7,tetros,SZ tetros);
     for(i=0;i<13;++i)j=i+rand()/(RAND_MAX/(14-i)+1),u=bag[j],bag[j]=bag[i],bag[i]=u;)
   OR ++bag_i;*t=bag[bag_i],t->pos[0]=GRID_X+CELL_W*4,t->pos[1]=GRID_Y+CELL_H*(GRID_H-1);}
-_ 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);
-  for(i=0;i<4;++i){w=a[1]+t.v[i][1],x=a[0]+t.v[i][0];Q(w>=GRID_H||w<0,R 1)Q(-1!=grid[w][x],R 1)}
-  R 0;}
 _ V tetro_fall(Tetro*t,F64 dt){_ F64 et=0;U8 q;
   t->pos[1]-=CELL_H,q=tetro_in_floor(*t),t->pos[1]+=CELL_H;
   Q(q,Q(et>=DELAY_BAKE,tetro_bake(*t),tetro_next(t),et=0)OR et+=dt)
   OR tetro_trans(t,(vec2){0,-32});}
+_ V tetro_move(Tetro*t,F64 x){
+  tetro_trans(t,(vec2){x,0});
+  Q(tetro_in_wall(*t),tetro_trans(t,(vec2){-x,0}))}
 
 _ V grid_draw(V){U8 i,j;S8 c;vec2 z={CELL_W,CELL_H},pos={GRID_X,GRID_Y};
   graph_shader_use(shader_tetro),
@@ -120,8 +128,6 @@ V core_tick(InputPoint p,InputButtons b,F64 dt){_ F64 et=0;
   Q(IB_Z&b.p,tetro_rot(&held, 1))
   Q(IB_X&b.p,tetro_rot(&held,-1))
   Q(IB_C&b.p,tetro_next(&held))
-  Q(IB_L&b.p,tetro_trans(&held,(vec2){-32, 0}))
-  Q(IB_R&b.p,tetro_trans(&held,(vec2){ 32, 0}))
-  Q(IB_U&b.p,tetro_trans(&held,(vec2){ 0, 32}))
-  Q(IB_D&b.p,tetro_trans(&held,(vec2){ 0,-32}))
+  Q(IB_L&b.p,tetro_move(&held,-32))
+  Q(IB_R&b.p,tetro_move(&held, 32))
   Q(IB_1&b.p,tetro_bake(held))}
-- 
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