public void GenerateDataBuffer(SpriteVOrigin vOrigin, SpriteHOrigin hOrigin)
{
//If there is a texture loaded and clips to make vertex data from
if( TextureID != 0 && mClips.Count > 0 ) {
//Allocate vertex buffer data
int totalSprites = mClips.Count;
VertexData[] vertexData = new VertexData[ totalSprites * 4 ];
mIndexBuffers = new int[ totalSprites ];
//Allocate vertex data buffer name
GL.GenBuffers( 1, out mVertexDataBuffer );
//Allocate index buffers names
GL.GenBuffers( totalSprites, mIndexBuffers );
//Go through clips
float tW = ImageWidth;
float tH = ImageHeight;
int[] spriteIndices = new int[ 4 ] { 0, 0, 0, 0 };
//Origin variables
float vTop = 0;
float vBottom = 0;
float vLeft = 0;
float vRight = 0;
for( int i = 0; i < totalSprites; ++i ) {
//Initialize indices
spriteIndices[ 0 ] = i * 4 + 0;
spriteIndices[ 1 ] = i * 4 + 1;
spriteIndices[ 2 ] = i * 4 + 2;
spriteIndices[ 3 ] = i * 4 + 3;
//Set origin (vertical)
switch (vOrigin) {
case SpriteVOrigin.Top: {
vTop = 0;
vBottom = mClips[ i ].Height;
}
break;
case SpriteVOrigin.Bottom: {
vTop = -mClips[ i ].Height;
vBottom = 0;
}
break;
default: {
vTop = (float)-mClips[ i ].Height / 2;
vBottom = (float)mClips[ i ].Height / 2;
}
break;
}
//Set origin (horizontal)
switch (hOrigin) {
case SpriteHOrigin.Left: {
vLeft = 0;
vRight = mClips[ i ].Width;
}
break;
case SpriteHOrigin.Right: {
vLeft = -mClips[ i ].Width;
vRight = 0;
}
break;
default: {
vLeft = (float)-mClips[ i ].Width / 2;
vRight = (float)mClips[ i ].Width / 2;
}
break;
}
//Top left
vertexData[spriteIndices[0]] = new VertexData(vLeft, vTop, ((float)mClips[i].Left) / tW, ((float)mClips[i].Top) / tH);
//Top right
vertexData[spriteIndices[1]] = new VertexData(vRight, vTop, ((float)mClips[i].Right) / tW, ((float)mClips[i].Top) / tH);
//Bottom right
vertexData[spriteIndices[2]] = new VertexData(vRight, vBottom, ((float)mClips[i].Right) / tW, ((float)mClips[i].Bottom) / tH);
//Bottom left
vertexData[spriteIndices[3]] = new VertexData(vLeft, vBottom, ((float)mClips[i].Left) / tW, ((float)mClips[i].Bottom) / tH);
//Bind sprite index buffer data
GL.BindBuffer(BufferTarget.ElementArrayBuffer, mIndexBuffers[ i ] );
GL.BufferData(BufferTarget.ElementArrayBuffer, (IntPtr)(4 * sizeof(int)), spriteIndices, BufferUsageHint.StaticDraw);
}
//Bind vertex data
GL.BindBuffer(BufferTarget.ArrayBuffer, mVertexDataBuffer );
GL.BufferData(BufferTarget.ArrayBuffer, (IntPtr)(totalSprites * 4 * VertexData.SizeInBytes), vertexData, BufferUsageHint.StaticDraw);
} else {
if( TextureID == 0 ) {
throw new Exception( "No texture to render with!" );
}
if( mClips.Count <= 0 ) {
throw new Exception( "No clips to generate vertex data from!" );
}
}
}
public void GenerateDataBuffer(SpriteVOrigin vOrigin, SpriteHOrigin hOrigin)
{
//If there is a texture loaded and clips to make vertex data from
if (TextureID != 0 && mClips.Count > 0)
{
//Allocate vertex buffer data
int totalSprites = mClips.Count;
VertexData[] vertexData = new VertexData[totalSprites * 4];
mIndexBuffers = new int[totalSprites];
//Allocate vertex data buffer name
GL.GenBuffers(1, out mVertexDataBuffer);
//Allocate index buffers names
GL.GenBuffers(totalSprites, mIndexBuffers);
//Go through clips
float tW = ImageWidth;
float tH = ImageHeight;
int[] spriteIndices = new int[4] {
0, 0, 0, 0
};
//Origin variables
float vTop = 0;
float vBottom = 0;
float vLeft = 0;
float vRight = 0;
for (int i = 0; i < totalSprites; ++i)
{
//Initialize indices
spriteIndices[0] = i * 4 + 0;
spriteIndices[1] = i * 4 + 1;
spriteIndices[2] = i * 4 + 2;
spriteIndices[3] = i * 4 + 3;
//Set origin (vertical)
switch (vOrigin)
{
case SpriteVOrigin.Top:
{
vTop = 0;
vBottom = mClips[i].Height;
}
break;
case SpriteVOrigin.Bottom:
{
vTop = -mClips[i].Height;
vBottom = 0;
}
break;
default:
{
vTop = (float)-mClips[i].Height / 2;
vBottom = (float)mClips[i].Height / 2;
}
break;
}
//Set origin (horizontal)
switch (hOrigin)
{
case SpriteHOrigin.Left:
{
vLeft = 0;
vRight = mClips[i].Width;
}
break;
case SpriteHOrigin.Right:
{
vLeft = -mClips[i].Width;
vRight = 0;
}
break;
default:
{
vLeft = (float)-mClips[i].Width / 2;
vRight = (float)mClips[i].Width / 2;
}
break;
}
//Top left
vertexData[spriteIndices[0]] = new VertexData(vLeft, vTop, mClips[i].Left / tW, mClips[i].Top / tH);
//Top right
vertexData[spriteIndices[1]] = new VertexData(vRight, vTop, mClips[i].Right / tW, mClips[i].Top / tH);
//Bottom right
vertexData[spriteIndices[2]] = new VertexData(vRight, vBottom, mClips[i].Right / tW, mClips[i].Bottom / tH);
//Bottom left
vertexData[spriteIndices[3]] = new VertexData(vLeft, vBottom, mClips[i].Left / tW, mClips[i].Bottom / tH);
//Bind sprite index buffer data
GL.BindBuffer(BufferTarget.ElementArrayBuffer, mIndexBuffers[i]);
GL.BufferData(BufferTarget.ElementArrayBuffer, (IntPtr)(4 * sizeof(int)), spriteIndices, BufferUsageHint.StaticDraw);
}
//Bind vertex data
GL.BindBuffer(BufferTarget.ArrayBuffer, mVertexDataBuffer);
GL.BufferData(BufferTarget.ArrayBuffer, (IntPtr)(totalSprites * 4 * VertexData.SizeInBytes), vertexData, BufferUsageHint.StaticDraw);
}
else
{
if (TextureID == 0)
{
throw new Exception("No texture to render with!");
}
if (mClips.Count <= 0)
{
throw new Exception("No clips to generate vertex data from!");
}
}
}
