UVRECT convertUV(UVRECT input, int tilesetId, int tilesetWidth, int tilesetHeight)
{
UVRECT output;
output.x1 = (1.0f / (float)tilesetWidth) * input.x1;
output.x2 = (1.0f / (float)tilesetWidth) * input.x2;
output.y1 = (1.0f / (float)tilesetHeight) * input.y2;
output.y2 = (1.0f / (float)tilesetHeight) * input.y1;
return(output);
}
void renderTile(int x, int y, float z, int tilesetid, UVRECT uv_rect)
{
renderTile(x, y, z, tilesetid, uv_rect, false);
}
void renderTile(int x, int y, float z, int tilesetid, UVRECT uv_rect, bool whole)
{
//tilesetid: 0 - A1, 1 - A2...8 - E
//step 1: bind appropriate texture
int tilesetWidth = 0;
int tilesetHeight = 0;
switch (tilesetid)
{
case 0: //A1
if (tilesetA1 == 0)
{
return;
}
bindTexture(tilesetA1);
tilesetWidth = tilesetA1_w;
tilesetHeight = tilesetA1_h;
break;
case 1: //A2
if (tilesetA2 == 0)
{
return;
}
bindTexture(tilesetA2);
tilesetWidth = tilesetA2_w;
tilesetHeight = tilesetA2_h;
break;
case 2: //A3
if (tilesetA3 == 0)
{
return;
}
bindTexture(tilesetA3);
tilesetWidth = tilesetA3_w;
tilesetHeight = tilesetA3_h;
break;
case 3: //A4
if (tilesetA4 == 0)
{
return;
}
bindTexture(tilesetA4);
tilesetWidth = tilesetA4_w;
tilesetHeight = tilesetA4_h;
break;
case 4: //A5
if (tilesetA5 == 0)
{
return;
}
bindTexture(tilesetA5);
tilesetWidth = tilesetA5_w;
tilesetHeight = tilesetA5_h;
break;
case 5: //B
if (tilesetB == 0)
{
return;
}
bindTexture(tilesetB);
tilesetWidth = tilesetB_w;
tilesetHeight = tilesetB_h;
break;
case 6: //C
if (tilesetC == 0)
{
return;
}
bindTexture(tilesetC);
tilesetWidth = tilesetC_w;
tilesetHeight = tilesetC_h;
break;
case 7: //D
if (tilesetD == 0)
{
return;
}
bindTexture(tilesetD);
tilesetWidth = tilesetD_w;
tilesetHeight = tilesetD_h;
break;
case 8: //E
if (tilesetE == 0)
{
return;
}
bindTexture(tilesetE);
tilesetWidth = tilesetE_w;
tilesetHeight = tilesetE_h;
break;
}
int drawx = x;
int drawy = 0 - y;
if (whole)
{
drawy -= 16;
}
//grab dimensions of the original src_rect before we convert it to uv
int draww = (int)(uv_rect.x2 - uv_rect.x1);
int drawh = (int)(uv_rect.y2 - uv_rect.y1);
//we'll set color on a per-draw basis for now in case we want to get crafty later
GL.Color4(1f, 1f, 1f, 1f);
//process the uv rect from pixels to uv
UVRECT tileuv = convertUV(uv_rect, tilesetid, tilesetWidth, tilesetHeight);
GL.Enable(EnableCap.Texture2D);
GL.Begin(BeginMode.Polygon);
GL.TexCoord2(tileuv.x1, tileuv.y2);
GL.Vertex3(drawx, drawy + drawh, z); // bottom left
GL.TexCoord2(tileuv.x1, tileuv.y1);
GL.Vertex3(drawx, drawy, z); // top left
GL.TexCoord2(tileuv.x2, tileuv.y1);
GL.Vertex3(drawx + draww, drawy, z); // top right
GL.TexCoord2(tileuv.x2, tileuv.y2);
GL.Vertex3(drawx + draww, drawy + drawh, z); // bottom right
GL.End();
}
void renderTile(int x, int y, float z, int tilesetid, UVRECT uv_rect){
renderTile(x,y,z,tilesetid,uv_rect,false);
}
void renderTile(int x, int y, float z, int tilesetid, UVRECT uv_rect, bool whole){
//tilesetid: 0 - A1, 1 - A2...8 - E
//step 1: bind appropriate texture
int tilesetWidth = 0;
int tilesetHeight = 0;
switch(tilesetid){
case 0: //A1
if (tilesetA1 == 0) return;
bindTexture(tilesetA1);
tilesetWidth = tilesetA1_w;
tilesetHeight = tilesetA1_h;
break;
case 1: //A2
if (tilesetA2 == 0) return;
bindTexture(tilesetA2);
tilesetWidth = tilesetA2_w;
tilesetHeight = tilesetA2_h;
break;
case 2: //A3
if (tilesetA3 == 0) return;
bindTexture(tilesetA3);
tilesetWidth = tilesetA3_w;
tilesetHeight = tilesetA3_h;
break;
case 3: //A4
if (tilesetA4 == 0) return;
bindTexture(tilesetA4);
tilesetWidth = tilesetA4_w;
tilesetHeight = tilesetA4_h;
break;
case 4: //A5
if (tilesetA5 == 0) return;
bindTexture(tilesetA5);
tilesetWidth = tilesetA5_w;
tilesetHeight = tilesetA5_h;
break;
case 5: //B
if (tilesetB == 0) return;
bindTexture(tilesetB);
tilesetWidth = tilesetB_w;
tilesetHeight = tilesetB_h;
break;
case 6: //C
if (tilesetC == 0) return;
bindTexture(tilesetC);
tilesetWidth = tilesetC_w;
tilesetHeight = tilesetC_h;
break;
case 7: //D
if (tilesetD == 0) return;
bindTexture(tilesetD);
tilesetWidth = tilesetD_w;
tilesetHeight = tilesetD_h;
break;
case 8: //E
if (tilesetE == 0) return;
bindTexture(tilesetE);
tilesetWidth = tilesetE_w;
tilesetHeight = tilesetE_h;
break;
}
int drawx = x;
int drawy = 0 - y;
if(whole) drawy -= 16;
//grab dimensions of the original src_rect before we convert it to uv
int draww = (int) (uv_rect.x2 - uv_rect.x1);
int drawh = (int) (uv_rect.y2 - uv_rect.y1);
//we'll set color on a per-draw basis for now in case we want to get crafty later
GL.Color4(1f, 1f, 1f, 1f);
//process the uv rect from pixels to uv
UVRECT tileuv = convertUV(uv_rect, tilesetid, tilesetWidth, tilesetHeight);
GL.Enable(EnableCap.Texture2D);
GL.Begin(BeginMode.Polygon);
GL.TexCoord2 (tileuv.x1, tileuv.y2);
GL.Vertex3(drawx, drawy + drawh, z); // bottom left
GL.TexCoord2 (tileuv.x1, tileuv.y1);
GL.Vertex3(drawx, drawy, z); // top left
GL.TexCoord2 (tileuv.x2, tileuv.y1);
GL.Vertex3(drawx + draww, drawy, z); // top right
GL.TexCoord2 (tileuv.x2, tileuv.y2);
GL.Vertex3(drawx + draww, drawy + drawh, z); // bottom right
GL.End();
}
UVRECT convertUV(UVRECT input, int tilesetId, int tilesetWidth, int tilesetHeight){
UVRECT output;
output.x1 = (1.0f / (float) tilesetWidth) * input.x1;
output.x2 = (1.0f / (float) tilesetWidth) * input.x2;
output.y1 = (1.0f / (float) tilesetHeight) * input.y2;
output.y2 = (1.0f / (float) tilesetHeight) * input.y1;
return output;
}
