/** Resets tessellator state and prepares for drawing (with the specified draw mode). */
public void startDrawing(int par1) {
if (isDrawing) {
throw new IllegalStateException("Already tesselating!");
} else {
isDrawing = true;
reset();
drawMode = par1;
hasNormals = false;
hasColor = false;
hasTexture = false;
hasBrightness = false;
isColorDisabled = false;
return;
}
}
/** Draws the data set up in this tessellator and resets the state to prepare for new drawing. */
public int draw() {
if (!isDrawing) {
throw new IllegalStateException("Not tesselating!");
}
isDrawing = false;
if (vertexCount > 0) {
intBuffer.clear();
intBuffer.put(rawBuffer, 0, rawBufferIndex);
byteBuffer.position(0);
byteBuffer.limit(rawBufferIndex * 4);
if (useVBO) {
vboIndex = (vboIndex + 1) % vboCount;
ARBVertexBufferObject.glBindBufferARB(
ARBVertexBufferObject.GL_ARRAY_BUFFER_ARB, vertexBuffers.get(vboIndex));
ARBVertexBufferObject.glBufferDataARB(
ARBVertexBufferObject.GL_ARRAY_BUFFER_ARB,
byteBuffer,
ARBVertexBufferObject.GL_STREAM_DRAW_ARB);
}
if (hasTexture) {
if (useVBO) {
GL11.glTexCoordPointer(2, GL11.GL_FLOAT, 32, 12L);
} else {
floatBuffer.position(3);
GL11.glTexCoordPointer(2, 32, floatBuffer);
}
GL11.glEnableClientState(GL11.GL_TEXTURE_COORD_ARRAY);
}
if (hasBrightness) {
OpenGlHelper.setClientActiveTexture(OpenGlHelper.lightmapTexUnit);
if (useVBO) {
GL11.glTexCoordPointer(2, GL11.GL_SHORT, 32, 28L);
} else {
shortBuffer.position(14);
GL11.glTexCoordPointer(2, 32, shortBuffer);
}
GL11.glEnableClientState(GL11.GL_TEXTURE_COORD_ARRAY);
OpenGlHelper.setClientActiveTexture(OpenGlHelper.defaultTexUnit);
}
if (hasColor) {
if (useVBO) {
GL11.glColorPointer(4, GL11.GL_UNSIGNED_BYTE, 32, 20L);
} else {
byteBuffer.position(20);
GL11.glColorPointer(4, true, 32, byteBuffer);
}
GL11.glEnableClientState(GL11.GL_COLOR_ARRAY);
}
if (hasNormals) {
if (useVBO) {
GL11.glNormalPointer(GL11.GL_UNSIGNED_BYTE, 32, 24L);
} else {
byteBuffer.position(24);
GL11.glNormalPointer(32, byteBuffer);
}
GL11.glEnableClientState(GL11.GL_NORMAL_ARRAY);
}
if (useVBO) {
GL11.glVertexPointer(3, GL11.GL_FLOAT, 32, 0L);
} else {
floatBuffer.position(0);
GL11.glVertexPointer(3, 32, floatBuffer);
}
GL11.glEnableClientState(GL11.GL_VERTEX_ARRAY);
if (drawMode == 7 && convertQuadsToTriangles) {
GL11.glDrawArrays(GL11.GL_TRIANGLES, 0, vertexCount);
} else {
GL11.glDrawArrays(drawMode, 0, vertexCount);
}
GL11.glDisableClientState(GL11.GL_VERTEX_ARRAY);
if (hasTexture) {
GL11.glDisableClientState(GL11.GL_TEXTURE_COORD_ARRAY);
}
if (hasBrightness) {
OpenGlHelper.setClientActiveTexture(OpenGlHelper.lightmapTexUnit);
GL11.glDisableClientState(GL11.GL_TEXTURE_COORD_ARRAY);
OpenGlHelper.setClientActiveTexture(OpenGlHelper.defaultTexUnit);
}
if (hasColor) {
GL11.glDisableClientState(GL11.GL_COLOR_ARRAY);
}
if (hasNormals) {
GL11.glDisableClientState(GL11.GL_NORMAL_ARRAY);
}
}
int i = rawBufferIndex * 4;
reset();
return i;
}
