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@@ -0,0 +1,131 @@
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+#include <stdio.h>
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+#include <math.h>
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+#include "raylib.h"
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+#include "raymath.h"
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+
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+#define DRAG -0.001f
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+
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+typedef struct ship_t
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+{
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+ Vector2 position;
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+ Vector2 velocity;
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+ Vector2 accel;
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+ Vector2 size;
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+ float angle;
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+} ship;
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+
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+typedef struct game_g
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+{
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+ ship s;
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+ float dt;
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+} game;
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+
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+game g;
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+
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+void ship_draw(const ship *s)
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+{
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+ DrawRectangleV(s->position, s->size, BLACK);
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+}
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+
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+void ship_up(ship *s)
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+{
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+
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+ Vector2 min = {.x = 0.0f, .y = 1.0f};
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+ Vector2 max = {.x = 0.0f, .y = -1.0f};
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+
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+ float x = cosf(s->angle);
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+ float y = sinf(s->angle);
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+ Vector2 polar = CLITERAL(Vector2){.x = x, .y = y};
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+
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+ s->accel.y -= 0.3f; // * pos.y;
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+ s->accel = Vector2Clamp(s->accel, min, max);
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+
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+}
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+
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+void ship_stop(ship *s)
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+{
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+
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+ Vector2 min = {.x = 1.0, .y = 1.0};
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+ Vector2 max = {.x = 0.0, .y = 0.0};
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+ s->accel.y -= 0.0001f;
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+ s->accel = Vector2Clamp(s->accel, min, max);
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+
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+}
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+
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+void ship_update(ship *s)
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+{
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+ Vector2 drag = {.x = DRAG * s->velocity.x, .y = DRAG * s->velocity.y};
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+
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+ s->velocity = Vector2Add(s->velocity, s->accel);
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+ s->velocity = Vector2Add(s->velocity, drag);
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+
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+ s->position.x += s->velocity.x * g.dt;
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+ s->position.y += s->velocity.y * g.dt;
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+
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+ float x = 100 * cosf(s->angle);
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+ float y = 100 * sinf(s->angle);
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+ Vector2 polar = CLITERAL(Vector2){.x = x, .y = y};
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+ // polar = Vector2Normalize(polar);
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+ Vector2 pos = Vector2Add(s->position, polar);
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+ // pos = Vector2Normalize(pos);
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+ // printf("polar (%f,%f)\n", pos.x, pos.y);
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+ DrawLine(s->position.x, s->position.y, pos.x, pos.y, RED);
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+}
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+
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+void process_inputs(game *g)
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+{
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+ if (IsKeyDown(KEY_W))
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+ {
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+ ship_up(&g->s);
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+ }
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+ else
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+ {
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+ ship_stop(&g->s);
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+ }
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+ if (IsKeyDown(KEY_D))
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+ {
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+ g->s.angle += 1.0f * g->dt;
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+ }
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+ if (IsKeyDown(KEY_A))
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+ {
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+ g->s.angle -= 1.0f * g->dt;
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+ }
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+}
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+
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+void text(const game *g)
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+{
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+ char ind[256] = {0};
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+ sprintf(ind, "ship position %f\nship speed %f\nship accel %f\nangle: %f\n", g->s.position.y, g->s.velocity.y, g->s.accel.y, g->s.angle);
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+ DrawText(ind, 10, 10, 20, BLACK);
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+}
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+
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+int main(void)
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+{
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+
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+ InitWindow(1820, 900, "Hello World");
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+
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+ ship s1 = {0};
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+ s1.position.x = 910.0f;
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+ s1.position.y = 450.0f;
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+
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+ s1.size.x = 10.0f;
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+ s1.size.y = 10.0f;
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+ s1.angle = 3 * PI / 2;
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+
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+ g.s = s1;
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+
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+ while (!WindowShouldClose())
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+ {
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+ BeginDrawing();
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+ ClearBackground(WHITE);
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+ process_inputs(&g);
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+ ship_draw(&g.s);
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+ ship_update(&g.s);
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+ text(&g);
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+ EndDrawing();
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+
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+ g.dt = GetFrameTime();
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+ }
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+
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+ return (0);
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+}
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