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// -*- C++ -*-
/*
* Simple MultimEdia LiTerator(SMELT)
* by Chris Xiong 2015
* Distortion grid implementation
*
* WARNING: This library is in development and interfaces would be very
* unstable.
*
*/
#include "smgrid.hpp"
#include <cstring>
SMELT *smGrid::sm=0;
smGrid::smGrid(int _cc,int _rc)
{
sm=smGetInterface(SMELT_APILEVEL);
cc=_cc;rc=_rc;cw=ch=.0;
quad.tex=0;quad.blend=BLEND_ALPHABLEND;
pos=new smVertex[cc*rc];
for(int i=0;i<cc*rc;++i)
{
pos[i].x=pos[i].y=pos[i].z=.0;
pos[i].tx=pos[i].ty=.0;
pos[i].col=0xFFFFFFFF;
}
}
smGrid::smGrid(const smGrid ©)
{
sm=smGetInterface(SMELT_APILEVEL);
cc=copy.cc;rc=copy.rc;cw=copy.cw;ch=copy.ch;
quad=copy.quad;tx=copy.tx;ty=copy.ty;w=copy.w;h=copy.h;
pos=new smVertex[cc*rc];memcpy(pos,copy.pos,sizeof(smVertex)*cc*rc);
}
smGrid::~smGrid(){delete[] pos;sm->smRelease();}
smGrid& smGrid::operator =(const smGrid ©)
{
if(this!=©)
{
sm=smGetInterface(SMELT_APILEVEL);
cc=copy.cc;rc=copy.rc;cw=copy.cw;ch=copy.ch;
quad=copy.quad;tx=copy.tx;ty=copy.ty;w=copy.w;h=copy.h;
delete[] pos;pos=new smVertex[cc*rc];
memcpy(pos,copy.pos,sizeof(smVertex)*cc*rc);
}
return *this;
}
void smGrid::setTexture(SMTEX tex){quad.tex=tex;}
void smGrid::setTextureRect4f(float _x,float _y,float _w,float _h)
{
float tw,th;
tx=_x;ty=_y;w=_w;h=_h;
if(quad.tex)
{
tw=(float)sm->smTextureGetWidth(quad.tex);
th=(float)sm->smTextureGetHeight(quad.tex);
}
else tw=w,th=h;
cw=w/(cc-1);ch=h/(rc-1);
for(int i=0;i<rc;++i)
for(int j=0;j<cc;++j)
{
pos[i*cc+j].tx=(tx+j*cw)/tw;
pos[i*cc+j].ty=(ty+i*ch)/th;
pos[i*cc+j].x=j*cw;
pos[i*cc+j].y=i*ch;
}
}
void smGrid::setTextureRectv(smTexRect rect){setTextureRect4f(rect.x,rect.y,rect.w,rect.h);}
void smGrid::setBlend(int blend){quad.blend=blend;}
void smGrid::setColor(int c,int r,DWORD col){if(c<cc&&r<rc)pos[r*cc+c].col=col;}
void smGrid::setPos(int c,int r,float x,float y,float z,int ref)
{
if(c<cc&&r<rc)
{
if(ref==GRID_REFCENTER)x+=cw*(cc-1)/2,y+=ch*(rc-1)/2;
if(ref==GRID_REFNODE)x+=c*cw,y+=r*ch;
if(ref==GRID_REFCURRENT)x+=pos[r*cc+c].x,y+=pos[r*cc+c].y;
pos[r*cc+c].x=x;
pos[r*cc+c].y=y;
}
}
void smGrid::clear(DWORD col)
{
for(int i=0;i<rc;++i)
for(int j=0;j<cc;++j)
{
pos[i*cc+j].x=j*cw;
pos[i*cc+j].y=i*ch;
pos[i*cc+j].z=.0;
pos[i*cc+j].col=col;
}
}
void smGrid::render(float x,float y)
{
for(int i=0;i<rc-1;++i)
for(int j=0;j<cc-1;++j)
{
int id=i*cc+j;
for(int k=0;k<4;++k)
{
int sub=k<2?id+k:id+cc+3-k;
quad.v[k].tx=pos[sub].tx;
quad.v[k].ty=pos[sub].ty;
quad.v[k].x=x+pos[sub].x;
quad.v[k].y=y+pos[sub].y;
quad.v[k].z=pos[sub].z;
quad.v[k].col=pos[sub].col;
}
sm->smRenderQuad(&quad);
}
}
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