void setup_camera(float fov, float ratio, float view_distance) {
GL11.glMatrixMode(GL11.GL_PROJECTION);
GL11.glLoadIdentity();
GLU.gluPerspective(fov, ratio, 0.01f, view_distance);
GL11.glMatrixMode(GL11.GL_MODELVIEW);
camera.set_attribs(fov, ratio, 0.01f, view_distance);
}
private void render_batch(ChunkNode.Batch batch) {
if (!camera.collides(batch.box)) return;
Renderer.draw_calls++;
// Use the shader the batch needs
GL20.glUseProgram(batch.shader);
// Bind VBO to vertex pointer
GL15.glBindBuffer(GL15.GL_ARRAY_BUFFER, batch.vert_buf);
GL11.glVertexPointer(3, GL11.GL_FLOAT, 0, 0);
// Bind the texture coord VBO to texture pointer
GL15.glBindBuffer(GL15.GL_ARRAY_BUFFER, batch.tex_buf);
GL11.glTexCoordPointer(2, GL11.GL_FLOAT, 0, 0);
// Bind the texture for this batch
GL11.glBindTexture(GL11.GL_TEXTURE_2D, batch.tex);
// Bind index array
GL15.glBindBuffer(GL15.GL_ELEMENT_ARRAY_BUFFER, batch.indices);
// Draw the block
GL12.glDrawRangeElements(
GL11.GL_QUADS,
0,
Constants.Chunk.block_number * 24 - 1,
batch.num_elements,
GL11.GL_UNSIGNED_INT,
0);
Renderer.batch_draw_calls++;
Renderer.quads += batch.num_elements;
// Unbind the texture
GL11.glBindTexture(GL11.GL_TEXTURE_2D, 0);
// Unbind all buffers
GL15.glBindBuffer(GL15.GL_ELEMENT_ARRAY_BUFFER, 0);
GL15.glBindBuffer(GL15.GL_ARRAY_BUFFER, 0);
GL20.glUseProgram(0);
}