unsigned int SpriteBatch_GL3::PushTexture(Texture *texture)
{
// check if the texture is already in use
// if so, return... we dont need to add it to our list of active txtures again
for(unsigned int i = 0; i <= m_currentTextureID; i++)
{
if( m_activeTextures[i] == texture )
return i;
}
// if we've used all the textures we can, than we need to flush to make room for another texture change
if (m_currentTextureID >= m_maxTextures-1)
FlushBatch();
// add the texture to our active texture list
m_activeTextures[m_currentTextureID] = texture;
// tell the shader which texture to use.
char texAttrib[32];
sprintf_s(texAttrib, 32, "u_texture%i", m_currentTextureID);
glUniform1i( glGetUniformLocation(m_shader, texAttrib), m_currentTextureID);
glActiveTexture( GL_TEXTURE0 + m_currentTextureID );
glBindTexture( GL_TEXTURE_2D, texture->GetTextureHandle() );
glActiveTexture( GL_TEXTURE0 );
// incronment current texture for the next PushTexture() to use.
m_currentTextureID += 1;
// return what the current texture was.
return m_currentTextureID-1;
}
void SpriteBatch::Impl::End()
{
if (!m_insideBeginEnd)
throw Exception("Begin must be called before End");
PrepareForRendering();
FlushBatch();
CleanupRendering();
m_insideBeginEnd = false;
}
void SpriteBatch_GL3::End()
{
if (m_processingRender == false)
return;
FlushBatch();
glUseProgram(0);
m_processingRender = false;
unsigned int viewWidth = m_pApplication->GetWindowWidth();
unsigned int viewHeight = m_pApplication->GetWindowHeight();
// resetup the projection and view
//GetOrtho(m_projection, 0.0f, (float)viewWidth, (float)viewHeight, 0.0f, -1.0f, 100.0f);
GetOrtho(m_projection, m_fCameraX, m_fCameraX + (float)viewWidth, m_fCameraY + (float)viewHeight, m_fCameraY, -1.0f, 100.0f);
}
void SpriteBatch_GL3::DrawSpriteTransformed3x3(Texture *texture, float *transformMat3x3, float width, float height, float xOrigin, float yOrigin)
{
if( texture == NULL ) texture = m_nullTexture;
if( ShouldFlush() ) FlushBatch();
unsigned int textureID = PushTexture( texture );
if( width == 0.0f ) width = (float)texture->GetWidth();
if( height == 0.0f ) height = (float)texture->GetHeight();
float tlX = (0.0f - xOrigin) * width; float tlY = (0.0f - yOrigin) * height;
float trX = (1.0f - xOrigin) * width; float trY = (0.0f - yOrigin) * height;
float brX = (1.0f - xOrigin) * width; float brY = (1.0f - yOrigin) * height;
float blX = (0.0f - xOrigin) * width; float blY = (1.0f - yOrigin) * height;
// transform the points by the matrix
// 0 1 2
// 3 4 5
// 6 7 8
//--------------------------------------------------------------------------
if( m_transformColumnMajor )
{
float x, y;
x = tlX; y=tlY;
tlX = x*transformMat3x3[0] + y*transformMat3x3[1] + transformMat3x3[2];
tlY = x*transformMat3x3[3] + y*transformMat3x3[4] + transformMat3x3[5];
x = trX; y=trY;
trX = x*transformMat3x3[0] + y*transformMat3x3[1] + transformMat3x3[2];
trY = x*transformMat3x3[3] + y*transformMat3x3[4] + transformMat3x3[5];
x = brX; y=brY;
brX = x*transformMat3x3[0] + y*transformMat3x3[1] + transformMat3x3[2];
brY = x*transformMat3x3[3] + y*transformMat3x3[4] + transformMat3x3[5];
x = blX; y=blY;
blX = x*transformMat3x3[0] + y*transformMat3x3[1] + transformMat3x3[2];
blY = x*transformMat3x3[3] + y*transformMat3x3[4] + transformMat3x3[5];
}
else
{
float x, y;
x = tlX; y=tlY;
tlX = x*transformMat3x3[0] + y*transformMat3x3[3] + transformMat3x3[6];
tlY = x*transformMat3x3[1] + y*transformMat3x3[4] + transformMat3x3[7];
x = trX; y=trY;
trX = x*transformMat3x3[0] + y*transformMat3x3[3] + transformMat3x3[6];
trY = x*transformMat3x3[1] + y*transformMat3x3[4] + transformMat3x3[7];
x = brX; y=brY;
brX = x*transformMat3x3[0] + y*transformMat3x3[3] + transformMat3x3[6];
brY = x*transformMat3x3[1] + y*transformMat3x3[4] + transformMat3x3[7];
x = blX; y=blY;
blX = x*transformMat3x3[0] + y*transformMat3x3[3] + transformMat3x3[6];
blY = x*transformMat3x3[1] + y*transformMat3x3[4] + transformMat3x3[7];
}
//--------------------------------------------------------------------------
int index = m_currentVert;
float r = m_r / 255.0f;
float g = m_g / 255.0f;
float b = m_b / 255.0f;
float a = m_a / 255.0f;
m_vertices[m_currentVert].pos[0] = tlX;
m_vertices[m_currentVert].pos[1] = tlY;
m_vertices[m_currentVert].pos[2] = (float)textureID;
m_vertices[m_currentVert].color[0] = r;
m_vertices[m_currentVert].color[1] = g;
m_vertices[m_currentVert].color[2] = b;
m_vertices[m_currentVert].color[3] = a;
m_vertices[m_currentVert].texcoord[0] = m_uvX;
m_vertices[m_currentVert].texcoord[1] = m_uvY + m_uvH;
m_currentVert++;
m_vertices[m_currentVert].pos[0] = trX;
m_vertices[m_currentVert].pos[1] = trY;
m_vertices[m_currentVert].pos[2] = (float)textureID;
m_vertices[m_currentVert].color[0] = r;
m_vertices[m_currentVert].color[1] = g;
m_vertices[m_currentVert].color[2] = b;
m_vertices[m_currentVert].color[3] = a;
m_vertices[m_currentVert].texcoord[0] = m_uvX + m_uvW;
m_vertices[m_currentVert].texcoord[1] = m_uvY + m_uvH;
m_currentVert++;
m_vertices[m_currentVert].pos[0] = brX;
m_vertices[m_currentVert].pos[1] = brY;
m_vertices[m_currentVert].pos[2] = (float)textureID;
m_vertices[m_currentVert].color[0] = r;
m_vertices[m_currentVert].color[1] = g;
m_vertices[m_currentVert].color[2] = b;
m_vertices[m_currentVert].color[3] = a;
m_vertices[m_currentVert].texcoord[0] = m_uvX + m_uvW;
m_vertices[m_currentVert].texcoord[1] = m_uvY;
m_currentVert++;
m_vertices[m_currentVert].pos[0] = blX;
m_vertices[m_currentVert].pos[1] = blY;
m_vertices[m_currentVert].pos[2] = (float)textureID;
m_vertices[m_currentVert].color[0] = r;
m_vertices[m_currentVert].color[1] = g;
m_vertices[m_currentVert].color[2] = b;
m_vertices[m_currentVert].color[3] = a;
m_vertices[m_currentVert].texcoord[0] = m_uvX;
m_vertices[m_currentVert].texcoord[1] = m_uvY;
m_currentVert++;
//-------------------
m_indices[m_currentIndex++] = (index + 0);
m_indices[m_currentIndex++] = (index + 2);
m_indices[m_currentIndex++] = (index + 3);
m_indices[m_currentIndex++] = (index + 0);
m_indices[m_currentIndex++] = (index + 1);
m_indices[m_currentIndex++] = (index + 2);
}
void SpriteBatch_GL3::DrawSprite( Texture *texture, float xPos, float yPos, float width, float height, float rotation, float xOrigin, float yOrigin)
{
if( texture == NULL ) texture = m_nullTexture;
if( ShouldFlush() ) FlushBatch();
unsigned int textureID = PushTexture( texture );
if( width == 0.0f ) width = (float)texture->GetWidth();
if( height == 0.0f ) height = (float)texture->GetHeight();
float tlX = (0.0f - xOrigin) * width; float tlY = (0.0f - yOrigin) * height;
float trX = (1.0f - xOrigin) * width; float trY = (0.0f - yOrigin) * height;
float brX = (1.0f - xOrigin) * width; float brY = (1.0f - yOrigin) * height;
float blX = (0.0f - xOrigin) * width; float blY = (1.0f - yOrigin) * height;
if( rotation != 0.0f )
{
float si = sinf(rotation); float co = cosf(rotation);
RotateAround(tlX, tlY, tlX, tlY, si, co);
RotateAround(trX, trY, trX, trY, si, co);
RotateAround(brX, brY, brX, brY, si, co);
RotateAround(blX, blY, blX, blY, si, co);
}
int index = m_currentVert;
float r = m_r / 255.0f;
float g = m_g / 255.0f;
float b = m_b / 255.0f;
float a = m_a / 255.0f;
m_vertices[m_currentVert].pos[0] = xPos + tlX;
m_vertices[m_currentVert].pos[1] = yPos + tlY;
m_vertices[m_currentVert].pos[2] = (float)textureID;
m_vertices[m_currentVert].color[0] = r;
m_vertices[m_currentVert].color[1] = g;
m_vertices[m_currentVert].color[2] = b;
m_vertices[m_currentVert].color[3] = a;
m_vertices[m_currentVert].texcoord[0] = m_uvX;
m_vertices[m_currentVert].texcoord[1] = m_uvY + m_uvH;
m_currentVert++;
m_vertices[m_currentVert].pos[0] = xPos + trX;
m_vertices[m_currentVert].pos[1] = yPos + trY;
m_vertices[m_currentVert].pos[2] = (float)textureID;
m_vertices[m_currentVert].color[0] = r;
m_vertices[m_currentVert].color[1] = g;
m_vertices[m_currentVert].color[2] = b;
m_vertices[m_currentVert].color[3] = a;
m_vertices[m_currentVert].texcoord[0] = m_uvX + m_uvW;
m_vertices[m_currentVert].texcoord[1] = m_uvY + m_uvH;
m_currentVert++;
m_vertices[m_currentVert].pos[0] = xPos + brX;
m_vertices[m_currentVert].pos[1] = yPos + brY;
m_vertices[m_currentVert].pos[2] = (float)textureID;
m_vertices[m_currentVert].color[0] = r;
m_vertices[m_currentVert].color[1] = g;
m_vertices[m_currentVert].color[2] = b;
m_vertices[m_currentVert].color[3] = a;
m_vertices[m_currentVert].texcoord[0] = m_uvX + m_uvW;
m_vertices[m_currentVert].texcoord[1] = m_uvY;
m_currentVert++;
m_vertices[m_currentVert].pos[0] = xPos + blX;
m_vertices[m_currentVert].pos[1] = yPos + blY;
m_vertices[m_currentVert].pos[2] = (float)textureID;
m_vertices[m_currentVert].color[0] = r;
m_vertices[m_currentVert].color[1] = g;
m_vertices[m_currentVert].color[2] = b;
m_vertices[m_currentVert].color[3] = a;
m_vertices[m_currentVert].texcoord[0] = m_uvX;
m_vertices[m_currentVert].texcoord[1] = m_uvY;
m_currentVert++;
//-------------------
m_indices[m_currentIndex++] = (index + 0);
m_indices[m_currentIndex++] = (index + 2);
m_indices[m_currentIndex++] = (index + 3);
m_indices[m_currentIndex++] = (index + 0);
m_indices[m_currentIndex++] = (index + 1);
m_indices[m_currentIndex++] = (index + 2);
}
