132 lines
3.5 KiB
C
132 lines
3.5 KiB
C
#ifndef __GAME_H__
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# define __GAME_H__
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#include "util.h"
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#include "render.h"
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#include "level.h"
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#include <gint/display.h>
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#include <libprof.h>
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/* A player's movement and data information. */
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struct player
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{
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//======= Movement =======//
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/* Position in the level (world units). */
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num z;
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/* Movement speed along the z axis (world units/s, ≥ 0). */
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num vz;
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/* Current platform; when rotating, platform the player jumped from
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(0..PLATFORM_COUNT-1) */
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int platform;
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/* Player's current movement stance. */
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enum {
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Running, /* Running on the ground */
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Jumping, /* Jumping, with jump key still pressed */
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Falling, /* Falling, typically after releasing jump key */
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} stance;
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/* Determine the player's animation and frame. */
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void get_anim(struct anim **anim, int *frame);
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/* Current animation frame. */
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int frame;
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/* Whether the player is airborne. */
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bool airborne() const { return this->stance != Running; }
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/* Jump direction.
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* when not jumping: 0
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* when jumping, while rotating: -1, 0 or +1
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* when jumping, after rotating: 0 */
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int jump_dir;
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/* Time spent jumping (s). */
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num jump_t;
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/* Key to watch to end the jump. */
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int jump_key;
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/* Current height relative to current platform (world units). */
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num height;
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/* Vertical speed (world units/s). */
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num vheight;
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/* Player angle relative to -y around +z (depends on the current platform,
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plus some extra during rotations). */
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num world_angle() const;
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vec2 world_angle_vector() const;
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/* Full player position in 3D space. */
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vec3 pos() const;
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/* Unit vectors in the directions of movement, accounting for player's
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rotation around the world cylinder. */
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vec3 forward() const;
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vec3 backward() const;
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vec3 up() const;
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vec3 down() const;
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//======= Data =======//
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/* Energy collected, in percent */
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num energy_percent;
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/* TODO: Skin, others? */
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};
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/* Dynamic information about one or multiple attempts at a single level. */
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struct game
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{
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struct level level;
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struct player player;
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struct camera camera;
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/* Absolute time spent in the level. */
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num t;
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/* Number of sections passed. */
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int sections_passed;
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struct {
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bool footer; /* Show performance footer */
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} debug;
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struct {
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prof_t effect_bpp;
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} perf;
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};
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//======= Functions on the game world space =======//
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/* Initialize constants for the game. */
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void space_init(void);
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/* Angle, in radians, of a platform arc (2π / PLATFORM_COUNT). */
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consteval num space_platform_arc()
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{
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return num(2 * 3.14159 / PLATFORM_COUNT);
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}
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/* Height (in world coordinates in the range [-LEVEL_RADIUS..0]) of a platform
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whose height value in the `struct platform` is given as parameter. */
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num space_platform_height(int height_value);
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/* Distance between the center of the world and a platform's plane. */
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num space_platform_distance(void);
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/* Position, in world units, of the provided flat platform. */
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struct prect space_platform_position(struct platform const *p);
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//======= Game management =======//
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/* Advance in the level by discarding platforms that have been passed. */
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void game_advance(struct game *game);
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/* Get platform height at the provided position. */
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num game_height_at(struct game *game, num z, int face);
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/* Returns the platform on which the player is running, if any. */
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const struct platform *game_platform_under_player(struct game const *game,
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struct player const *player);
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#endif /* __GAME_H__ */
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