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#include "rendering.h"
#include "SDL_stdinc.h"
#include "../game.h"
#include <SDL2/SDL.h>
#define GAP_SIZE (fminf(CELL_WIDTH, CELL_HEIGHT) / 1.1f)
int scc(int code) {
if (code < 0) {
fprintf(stderr, "SDL Error: %s\n", SDL_GetError());
exit(1);
}
return code;
}
void *scp(void *ptr) {
if (ptr == NULL) {
fprintf(stderr, "SDL Error: %s\n", SDL_GetError());
exit(1);
}
return ptr;
}
SDL_Vertex sdl_color_hex_vertex(int x, int y, Uint32 hex) {
SDL_Vertex vertex;
vertex.position.x = (float)x;
vertex.position.y = (float)y;
vertex.color.r = (hex >> (3 * 8)) & 0xFF;
vertex.color.g = (hex >> (2 * 8)) & 0xFF;
vertex.color.b = (hex >> (1 * 8)) & 0xFF;
vertex.color.a = (hex >> (0 * 8)) & 0xFF;
vertex.tex_coord.x = 0;
vertex.tex_coord.y = 0;
return vertex;
}
void render_board_grid(SDL_Renderer *renderer) {
SDL_SetRenderDrawColor(renderer, HEX_COLOR(GRID_COLOR));
for (int x = 1; x < BOARD_WIDTH; ++x) {
SDL_RenderDrawLine(renderer,
x * CELL_WIDTH,
0,
x * CELL_WIDTH,
SCREEN_HEIGHT);
}
for (int x = 1; x < BOARD_HEIGHT; ++x) {
SDL_RenderDrawLine(renderer,
0,
x * CELL_HEIGHT,
SCREEN_WIDTH,
x * CELL_HEIGHT);
}
}
#define AGENT_CELL_POS_X agent.pos.x * CELL_WIDTH
#define AGENT_CELL_POS_Y agent.pos.y * CELL_HEIGHT
#define VERTEX_0 \
sdl_color_hex_vertex(AGENT_CELL_POS_X + GAP_SIZE, \
AGENT_CELL_POS_Y + GAP_SIZE, \
color)
#define VERTEX_1 \
sdl_color_hex_vertex(AGENT_CELL_POS_X + CELL_WIDTH - GAP_SIZE, \
AGENT_CELL_POS_Y + GAP_SIZE, \
color)
#define VERTEX_2 \
sdl_color_hex_vertex(AGENT_CELL_POS_X + GAP_SIZE, \
AGENT_CELL_POS_Y + CELL_HEIGHT - GAP_SIZE, \
color)
#define VERTEX_3 \
sdl_color_hex_vertex(AGENT_CELL_POS_X + CELL_WIDTH - GAP_SIZE, \
AGENT_CELL_POS_Y + CELL_HEIGHT - GAP_SIZE, \
color)
#define FOOD_CELL_POS_X x * CELL_WIDTH
#define FOOD_CELL_POS_Y y * CELL_HEIGHT
SDL_Vertex* sdl_draw_food_diamond(int y, int x) {
SDL_Vertex* vertices = malloc(4 * sizeof(SDL_Vertex));
if (vertices == NULL) {
fprintf(stderr, "Vertex Memory allocation failed\n");
exit(1);
}
vertices[0] = sdl_color_hex_vertex(FOOD_CELL_POS_X + CELL_WIDTH - GAP_SIZE,
FOOD_CELL_POS_Y + (CELL_WIDTH / 2),
FOOD_COLOR);
vertices[1] = sdl_color_hex_vertex(FOOD_CELL_POS_X + (CELL_WIDTH / 2),
FOOD_CELL_POS_Y + GAP_SIZE,
FOOD_COLOR);
vertices[2] = sdl_color_hex_vertex(FOOD_CELL_POS_X + GAP_SIZE,
FOOD_CELL_POS_Y + (CELL_WIDTH / 2),
FOOD_COLOR);
vertices[3] = sdl_color_hex_vertex(FOOD_CELL_POS_X + (CELL_WIDTH / 2),
FOOD_CELL_POS_Y + CELL_HEIGHT - GAP_SIZE,
FOOD_COLOR);
return vertices;
}
SDL_Vertex* sdl_draw_agent_triangle(Agent agent) {
SDL_Vertex* vertices = malloc(3 * sizeof(SDL_Vertex));
if (vertices == NULL) {
fprintf(stderr, "Vertex Memory allocation failed\n");
exit(1);
}
Uint32 color = agent.health <= 0 ? AGENT_COLOR_DEAD : AGENT_COLOR_ALIVE;
switch (agent.dir) {
case DIR_LEFT:
vertices[0] = VERTEX_0;
vertices[1] = VERTEX_2;
vertices[2] = sdl_color_hex_vertex(AGENT_CELL_POS_X + CELL_WIDTH - GAP_SIZE,
AGENT_CELL_POS_Y + (CELL_WIDTH / 2),
color);
break;
case DIR_DOWN:
vertices[0] = VERTEX_2;
vertices[1] = VERTEX_3;
vertices[2] = sdl_color_hex_vertex(AGENT_CELL_POS_X + (CELL_WIDTH / 2),
AGENT_CELL_POS_Y + GAP_SIZE,
color);
break;
case DIR_RIGHT:
vertices[0] = VERTEX_1;
vertices[1] = VERTEX_3;
vertices[2] = sdl_color_hex_vertex(AGENT_CELL_POS_X + GAP_SIZE,
AGENT_CELL_POS_Y + (CELL_WIDTH / 2),
color);
break;
case DIR_UP:
vertices[0] = VERTEX_0;
vertices[1] = VERTEX_1;
vertices[2] = sdl_color_hex_vertex(AGENT_CELL_POS_X + (CELL_WIDTH / 2),
AGENT_CELL_POS_Y + CELL_HEIGHT - GAP_SIZE,
color);
break;
}
return vertices;
}
void render_agent(SDL_Renderer *renderer, Agent agent) {
SDL_Vertex * vertices = sdl_draw_agent_triangle(agent);
scc(SDL_RenderGeometry(renderer, NULL, vertices, 3, NULL, 0));
free(vertices); // sdl_draw_agent_triangle's malloc
}
void render_game(SDL_Renderer *renderer, const Game *game) {
for (size_t i = 0; i < AGENTS_COUNT; ++i) {
render_agent(renderer, game->agents[i]);
}
// Render Foods
const int indices[] = {0, 1, 2, 0, 3, 2};
for(int y = 0; y < BOARD_HEIGHT; ++y) {
for (int x = 0; x < BOARD_WIDTH; ++x) {
if (game->foods_map[y][x]) {
SDL_Vertex *vertices = sdl_draw_food_diamond(y, x);
scc(SDL_RenderGeometry(renderer, NULL, vertices, 4, indices, 6));
free(vertices); // sdl_draw_food_diamond's malloc
}
if (game->walls_map[y][x]) {
SDL_Rect rect = {// Check why int floorf
(int)floorf(x * CELL_WIDTH),
(int)floorf(y * CELL_HEIGHT),
(int)floorf(CELL_WIDTH), (int)floorf(CELL_HEIGHT)};
SDL_SetRenderDrawColor(renderer, HEX_COLOR(WALL_COLOR));
SDL_RenderFillRect(renderer, &rect);
}
}
}
// Render Walls
for (size_t i = 0; i < WALLS_COUNT; ++i) {
}
}
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