Created chunk renderer

code/source-c/blocks.h

@@ -20,6 +20,7 @@ typedef struct tc_block_attribute
 typedef struct tc_block_entry
 {
     char                       *name;
+    uint32_t                    identifier;
     
     uint32_t                    attributes_capacity;
     uint32_t                    num_attributes;

code/source-c/default_terrain_generator.c

@@ -0,0 +1,31 @@
+#include "world.h"
+
+bool tc_generate_default_terrain_chunk(tc_worldgen_s *gen, tc_chunk_s *chunk)
+{
+    tc_block_s                  block;
+    block.type_identifier           = 1;
+    block.position.x                = 0.0f;
+    block.position.y                = 0.0f;
+    block.position.z                = 0.0f;
+    
+    uint32_t                    x_in_chunk              = 0;
+    uint32_t                    y_in_chunk              = 0;
+    uint32_t                    z_in_chunk              = 0;
+    while(x_in_chunk < 32)
+    {
+        y_in_chunk                      = 0;
+        while(y_in_chunk < 32)
+        {
+            z_in_chunk                      = 0;
+            while(z_in_chunk < 32)
+            {
+                tc_set_block_in_chunk(chunk, x_in_chunk, y_in_chunk, z_in_chunk, block);
+                ++z_in_chunk;
+            }
+            ++y_in_chunk;
+        }
+        ++x_in_chunk;
+    }
+    
+    return true;
+}           

code/source-c/initialization.c

@@ -1,4 +1,5 @@
 #include "state.h"
+#include "world.h"
 
 #include <SDL2/SDL.h>
 
@@ -17,6 +18,10 @@ void tc_init_renderer(techneck_s *techneck)
         SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE
     );
     
+    techneck->renderer.active_camera.position.x = 0.0f;
+    techneck->renderer.active_camera.position.y = 0.0f;
+    techneck->renderer.active_camera.position.z = 0.0f;
+    
     techneck->renderer.gl_context               = SDL_GL_CreateContext(techneck->renderer.window);
     gladLoadGLLoader(&SDL_GL_GetProcAddress);
     gladLoadGL();
@@ -31,6 +36,8 @@ techneck_s tc_init()
 {
     techneck_s              techneck;
     tc_init_renderer(&techneck);
+    techneck.main_world         = tc_init_worlds();
+    techneck.block_registry     = tc_init_blocks();
     
     return techneck;
 }

code/source-c/main.c

@@ -9,7 +9,8 @@ techneck_s       tc_game_state_g;
 mat4x4                  projection_matrix;
 mat4x4                  view_matrix;
 
-float triangle_vertices[108] = {
+float triangle_vertices[108] =
+{
     // Front
     -0.5f, -0.5f, -0.5f,
     -0.5f, 0.5f, -0.5f,
@@ -62,9 +63,7 @@ float triangle_vertices[108] = {
     
     0.5f, -0.5f, 0.5f,
     -0.5f, -0.5f, 0.5f,
-    0.5f, -0.5f, -0.5f,
-    
-    
+    0.5f, -0.5f, -0.5f
 };
 
 tc_vec3_s               tc_camera_position = { 0.0f, 0.0f, 0.0f };
@@ -124,7 +123,8 @@ void render()
     glUniformMatrix4fv(view_uniform_location, 1, GL_FALSE, &view_matrix[0][0]);
     // printf("%d\n", view_uniform_location);
     
-    render_block(block);
+    // render_block(block);
+    tc_draw_world(&tc_game_state_g.main_world);
     
     SDL_GL_SwapWindow(tc_game_state_g.renderer.window);
 }
@@ -261,7 +261,7 @@ bool update()
 int main(int argc, char **argv)
 {
     tc_game_state_g                     = tc_init();
-    tc_game_state_g.block_registry      = tc_init_blocks();
+    tc_new_chunk(&tc_game_state_g.main_world, 0.0f, 0.0f, 0.0f);
     
     block    = tc_new_block_at_3f(0.0, 0.0, 0.0);
     

code/source-c/meshize.c

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

code/source-c/state.h

@@ -8,30 +8,8 @@
 
 #include "shaders.h"
 #include "blocks.h"
-
-typedef struct tc_vec3
-{
-    float               x;
-    float               y;
-    float               z;
-    
-} tc_vec3_s;
-
-typedef struct tc_object
-{
-    uint32_t            vbo;
-    uint32_t            vao;
-    tc_vec3_s           position;
-    tc_vec3_s           rotation;
-    
-} tc_object_s;
-
-typedef struct tc_block
-{
-    tc_vec3_s           position;
-    tc_object_s         drawing;
-    
-} tc_block_s;
+#include "world.h"
+#include "utility.h"
 
 typedef struct tc_camera
 {
@@ -55,6 +33,7 @@ typedef struct
 {
     tc_renderer_s           renderer;
     tc_block_registry_s     block_registry;
+    tc_world_s              main_world;
     
 } techneck_s;
 

code/source-c/utility.h

@@ -0,0 +1,23 @@
+
+#ifndef TC_UTILITY_H 
+#define TC_UTILITY_H
+
+typedef struct tc_vec3
+{
+    float               x;
+    float               y;
+    float               z;
+    
+} tc_vec3_s;
+
+typedef struct tc_object
+{
+    uint32_t            vbo;
+    uint32_t            vao;
+    tc_vec3_s           position;
+    tc_vec3_s           rotation;
+    
+} tc_object_s;
+
+#endif
+

code/source-c/world.c

@@ -0,0 +1,106 @@
+#include "world.h"
+#include "state.h"
+#include <linmath.h>
+
+#include <stdlib.h>
+
+tc_worldgen_s tc_default_terrain_generator_g;
+
+void tc_draw_chunk(tc_chunk_s *chunk)
+{
+    mat4x4              model_matrix;
+    mat4x4_translate(model_matrix, chunk->position.x*32, chunk->position.y*32, chunk->position.z*32);
+    
+    int                 model_matrix_uniform_location =
+    glGetUniformLocation(tc_game_state_g.renderer.draw_shader.program_id, "model_matrix");
+    glUniformMatrix4fv(model_matrix_uniform_location, 1, GL_FALSE, &model_matrix[0][0]);
+    
+    // glBindVertexArray(chunk->vao);
+    glBindBuffer(GL_ARRAY_BUFFER, chunk->vertex_data);
+    glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(float), (void *) 0);
+    glEnableVertexAttribArray(0);
+    
+    glDrawArrays(GL_TRIANGLES, 0, chunk->num_vertices);
+    
+    glBindVertexArray(0);
+}
+
+void tc_init_world_generators()
+{
+    tc_default_terrain_generator_g.name                 = "Default Terrain Generator";
+    tc_default_terrain_generator_g.fn_generate_chunk    = &tc_generate_default_terrain_chunk;
+}
+ 
+tc_world_s tc_init_worlds()
+{
+    tc_init_world_generators();
+    
+    tc_world_s              world;
+    world.chunks_capacity       = 256;
+    world.num_chunks            = 0;
+    world.chunks                = calloc(sizeof(tc_chunk_s *), world.chunks_capacity);
+    world.worldgen              = &tc_default_terrain_generator_g;
+    
+    return world;
+}
+
+
+
+void tc_set_block_in_chunk(
+    tc_chunk_s *chunk,
+    uint32_t x, uint32_t y, uint32_t z,
+    tc_block_s block
+) {
+    chunk->blocks[x][y][z]      = block;
+}
+
+
+
+void tc_draw_world(tc_world_s *world)
+{
+    uint32_t                chunk_index         = 0;
+    while(chunk_index < world->num_chunks)
+    {
+        tc_draw_chunk(world->chunks[chunk_index]);
+        ++chunk_index;
+    }
+}
+
+void tc_add_chunk(tc_world_s *world, tc_chunk_s *chunk)
+{
+    if(world->num_chunks >= world->chunks_capacity)
+    {
+        world->chunks_capacity                 *= 2;
+        world->chunks                           = realloc(world->chunks, sizeof(tc_chunk_s *) * world->chunks_capacity);
+    }
+    world->chunks[world->num_chunks]        = chunk;
+    ++world->num_chunks;
+}
+
+// Creates & Generates a chunk and provides a pointer to it
+tc_chunk_s * tc_new_chunk(tc_world_s *world, float x, float y, float z)
+{
+    tc_chunk_s             *chunk               = malloc(sizeof(tc_chunk_s));
+    chunk->position.x           = x;
+    chunk->position.y           = y;
+    chunk->position.z           = z;
+    world->worldgen->fn_generate_chunk(world->worldgen, chunk);
+    tc_meshize_chunk(chunk);
+    
+    glGenVertexArrays(1, &chunk->vao);
+    glBindVertexArray(chunk->vao);
+    
+    glGenBuffers(1, &chunk->vertex_data);
+    glBindBuffer(GL_ARRAY_BUFFER, chunk->vertex_data);
+    
+    glBufferData(GL_ARRAY_BUFFER, chunk->num_vertices * 3 * sizeof(float), chunk->vertex_positions, GL_STATIC_DRAW);
+    glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(float), (void *) 0);
+    glEnableVertexAttribArray(0);
+    
+    glBindVertexArray(0);
+    
+    tc_add_chunk(world, chunk);
+    
+    return chunk;
+}
+

code/source-c/world.h

@@ -0,0 +1,70 @@
+
+#ifndef TC_WORLD_H
+#define TC_WORLD_H
+
+#include <stdbool.h>
+#include <stdint.h>
+
+#include "blocks.h"
+#include "utility.h"
+
+typedef struct  tc_worldgen             tc_worldgen_s;
+typedef struct  tc_block                tc_block_s;
+typedef struct  tc_chunk                tc_chunk_s;
+typedef struct  tc_world                tc_world_s;
+
+struct tc_worldgen
+{
+    char               *name;
+    bool              (*fn_generate_chunk)              (tc_worldgen_s *gen, tc_chunk_s *chunk);
+    
+};
+
+struct tc_block
+{
+    uint32_t            type_identifier;
+    tc_vec3_s           position;
+    tc_object_s         drawing;
+    
+};
+
+struct tc_chunk
+{
+    tc_vec3_s                   position;
+    tc_block_s                  blocks[32][32][32];
+    
+    uint32_t                    num_vertices;
+    float                      *vertex_positions;
+    
+    uint32_t                    vao;
+    uint32_t                    vertex_data;
+    
+};
+
+struct tc_world
+{
+    uint32_t                    chunks_capacity;
+    uint32_t                    num_chunks;
+    tc_chunk_s                **chunks;
+    
+    tc_worldgen_s              *worldgen;
+    
+};
+
+tc_world_s          tc_init_worlds          ();
+void                tc_draw_world           (tc_world_s *world);
+
+tc_chunk_s *        tc_new_chunk            (tc_world_s *world, float x, float y, float z);
+
+void tc_set_block_in_chunk(
+    tc_chunk_s *chunk,
+    uint32_t x, uint32_t y, uint32_t z,
+    tc_block_s block
+);
+
+void                tc_meshize_chunk                        (tc_chunk_s *chunk);
+
+bool                tc_generate_default_terrain_chunk       (tc_worldgen_s *gen, tc_chunk_s *chunk);
+
+#endif
+