147 lines
4.0 KiB
C
147 lines
4.0 KiB
C
#include "world.h"
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#include <stdlib.h>
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#include <string.h>
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float tc_block_vertices[108] =
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{
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// Front
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-0.5f, -0.5f, -0.5f,
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-0.5f, 0.5f, -0.5f,
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0.5f, -0.5f, -0.5f,
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0.5f, 0.5f, -0.5f,
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0.5f, -0.5f, -0.5f,
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-0.5f, 0.5f, -0.5f,
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// Back
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-0.5f, -0.5f, 0.5f,
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-0.5f, 0.5f, 0.5f,
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0.5f, -0.5f, 0.5f,
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0.5f, 0.5f, 0.5f,
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0.5f, -0.5f, 0.5f,
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-0.5f, 0.5f, 0.5f,
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// Left
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-0.5f, 0.5f, -0.5f,
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-0.5f, -0.5f, -0.5f,
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-0.5f, -0.5f, 0.5f,
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-0.5f, 0.5f, -0.5f,
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-0.5f, 0.5f, 0.5f,
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-0.5f, -0.5f, 0.5f,
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// Right
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0.5f, 0.5f, -0.5f,
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0.5f, -0.5f, -0.5f,
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0.5f, -0.5f, 0.5f,
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0.5f, 0.5f, -0.5f,
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0.5f, 0.5f, 0.5f,
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0.5f, -0.5f, 0.5f,
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// Top
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-0.5f, 0.5f, -0.5f,
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-0.5f, 0.5f, 0.5f,
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0.5f, 0.5f, -0.5f,
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0.5f, 0.5f, 0.5f,
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-0.5f, 0.5f, 0.5f,
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0.5f, 0.5f, -0.5f,
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// Bottom
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-0.5f, -0.5f, -0.5f,
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-0.5f, -0.5f, 0.5f,
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0.5f, -0.5f, -0.5f,
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0.5f, -0.5f, 0.5f,
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-0.5f, -0.5f, 0.5f,
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0.5f, -0.5f, -0.5f
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};
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uint32_t tc_count_chunk_vertices(tc_chunk_s *chunk)
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{
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uint32_t num_vertices = 0;
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uint32_t x_in_chunk = 0;
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uint32_t y_in_chunk = 0;
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uint32_t z_in_chunk = 0;
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while(x_in_chunk < 32)
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{
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y_in_chunk = 0;
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while(y_in_chunk < 32)
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{
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z_in_chunk = 0;
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while(z_in_chunk < 32)
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{
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if(chunk->blocks[x_in_chunk][y_in_chunk][z_in_chunk].type_identifier > 0)
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{
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num_vertices += 36;
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}
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++z_in_chunk;
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}
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++y_in_chunk;
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}
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++x_in_chunk;
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}
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return num_vertices;
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}
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void tc_meshize_chunk(tc_chunk_s *chunk)
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{
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chunk->num_vertices = tc_count_chunk_vertices(chunk);
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chunk->vertex_positions = malloc(sizeof(float) * 3 * chunk->num_vertices);
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uint32_t vertex_index = 0;
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float block_positions[36*3];
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uint32_t x_in_chunk = 0;
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uint32_t y_in_chunk = 0;
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uint32_t z_in_chunk = 0;
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while(x_in_chunk < 32)
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{
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y_in_chunk = 0;
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while(y_in_chunk < 32)
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{
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z_in_chunk = 0;
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while(z_in_chunk < 32)
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{
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if(chunk->blocks[x_in_chunk][y_in_chunk][z_in_chunk].type_identifier > 0)
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{
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memcpy(
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block_positions,
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tc_block_vertices,
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sizeof(float) * 36 * 3
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);
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// Move the current block to where it is supposed to be
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uint32_t vertex_of_block = 0;
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while(vertex_of_block < 36)
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{
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uint32_t vertex_start = vertex_of_block * 3;
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block_positions[vertex_start] +=
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x_in_chunk;
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block_positions[vertex_start + 1] +=
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y_in_chunk;
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block_positions[vertex_start + 2] +=
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z_in_chunk;
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++vertex_of_block;
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}
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memcpy(
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&chunk->vertex_positions[vertex_index*3],
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block_positions,
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sizeof(float) * 36 * 3
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);
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vertex_index += 36;
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}
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++z_in_chunk;
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}
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++y_in_chunk;
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}
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++x_in_chunk;
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}
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}
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