/apps: separate /apps/testgame into /apps/platformer and /apps/scenery, update /apps/template

apps/scenery/scenes/ingame.c

@@ -0,0 +1,108 @@
+#include "ingame.h"
+#include "title.h"
+#include "scene.h"
+
+#include "twn_game_api.h"
+
+#define STB_PERLIN_IMPLEMENTATION
+#include <stb_perlin.h>
+
+
+static void ingame_tick(State *state) {
+    SceneIngame *scn = (SceneIngame *)state->scene;
+
+    if (input_is_mouse_captured(&ctx.input)) {
+        const float sensitivity = 0.6f; /* TODO: put this in a better place */
+        scn->yaw += (float)ctx.input.mouse_relative_position.x * sensitivity;
+        scn->pitch -= (float)ctx.input.mouse_relative_position.y * sensitivity;
+        scn->pitch = clampf(scn->pitch, -89.0f, 89.0f);
+
+        const float yaw_rad = scn->yaw * (float)DEG2RAD;
+        const float pitch_rad = scn->pitch * (float)DEG2RAD;
+
+        scn->cam.target = m_vec_norm(((Vec3){
+            cosf(yaw_rad) * cosf(pitch_rad),
+            sinf(pitch_rad),
+            sinf(yaw_rad) * cosf(pitch_rad)
+        }));
+    }
+
+    const Vec3 right = m_vec_norm(m_vec_cross(scn->cam.target, scn->cam.up));
+    const float speed = 0.04f; /* TODO: put this in a better place */
+    if (input_is_action_pressed(&ctx.input, "player_left"))
+        scn->cam.pos = vec3_sub(scn->cam.pos, m_vec_scale(right, speed));
+
+    if (input_is_action_pressed(&ctx.input, "player_right"))
+        scn->cam.pos = vec3_add(scn->cam.pos, m_vec_scale(right, speed));
+
+    if (input_is_action_pressed(&ctx.input, "player_forward"))
+        scn->cam.pos = vec3_add(scn->cam.pos, m_vec_scale(scn->cam.target, speed));
+
+    if (input_is_action_pressed(&ctx.input, "player_backward"))
+        scn->cam.pos = vec3_sub(scn->cam.pos, m_vec_scale(scn->cam.target, speed));
+
+    if (input_is_action_pressed(&ctx.input, "player_jump"))
+        scn->cam.pos.y += speed;
+
+    if (input_is_action_pressed(&ctx.input, "player_run"))
+        scn->cam.pos.y -= speed;
+
+    /* toggle mouse capture with end key */
+    if (input_is_action_just_pressed(&ctx.input, "mouse_capture_toggle")) {
+        input_set_mouse_captured(&ctx.input, !input_is_mouse_captured(&ctx.input));
+    }
+
+    set_camera(&scn->cam);
+
+    #define TERRAIN_FREQUENCY 0.1f
+
+    for (int y = 64; y--;) {
+        for (int x = 64; x--;) {
+            float d0 = stb_perlin_noise3((float)x       * TERRAIN_FREQUENCY, (float)y       * TERRAIN_FREQUENCY, 0, 0, 0, 0) * 20 - 6;
+            float d1 = stb_perlin_noise3((float)(x + 1) * TERRAIN_FREQUENCY, (float)y       * TERRAIN_FREQUENCY, 0, 0, 0, 0) * 20 - 6;
+            float d2 = stb_perlin_noise3((float)(x + 1) * TERRAIN_FREQUENCY, (float)(y - 1) * TERRAIN_FREQUENCY, 0, 0, 0, 0) * 20 - 6;
+            float d3 = stb_perlin_noise3((float)x       * TERRAIN_FREQUENCY, (float)(y - 1) * TERRAIN_FREQUENCY, 0, 0, 0, 0) * 20 - 6;
+
+            unfurl_triangle("/assets/grass.gif",
+                            (Vec3){ (float)x,     d0, (float)y },
+                            (Vec3){ (float)x + 1, d1, (float)y },
+                            (Vec3){ (float)x,     d3, (float)y - 1 },
+                            (Vec2sh){ 1024, 768 },
+                            (Vec2sh){ 1024, 0 },
+                            (Vec2sh){ 0, 768 });
+
+            unfurl_triangle("/assets/grass.gif",
+                            (Vec3){ (float)x + 1, d1, (float)y },
+                            (Vec3){ (float)x + 1, d2, (float)y - 1 },
+                            (Vec3){ (float)x,     d3, (float)y - 1 },
+                            (Vec2sh){ 1024, 0 },
+                            (Vec2sh){ 0, 0 },
+                            (Vec2sh){ 0, 768 });
+        }
+    }
+}
+
+
+static void ingame_end(State *state) {
+    free(state->scene);
+}
+
+
+Scene *ingame_scene(State *state) {
+    (void)state;
+
+    SceneIngame *new_scene = ccalloc(1, sizeof *new_scene);
+    new_scene->base.tick = ingame_tick;
+    new_scene->base.end = ingame_end;
+
+    new_scene->cam = (Camera){ .pos = { 32, 0, 1 }, .up = { 0, 1, 0 }, .fov = (float)M_PI_2 };
+
+    audio_play_ex("music/mod65.xm", "soundtrack", (PlayAudioArgs){
+        .repeat = true,
+        .volume = 1.0f
+    });
+
+    input_set_mouse_captured(&ctx.input, true);
+
+    return (Scene *)new_scene;
+}

apps/scenery/scenes/ingame.h

@@ -0,0 +1,25 @@
+#ifndef INGAME_H
+#define INGAME_H
+
+#include "twn_game_api.h"
+
+#include "../state.h"
+#include "scene.h"
+
+
+typedef struct SceneIngame {
+    Scene base;
+
+    Camera cam;
+
+    /* TODO: put this in a better place */
+    float yaw;
+    float pitch;
+    float roll;
+} SceneIngame;
+
+
+Scene *ingame_scene(State *state);
+
+
+#endif

apps/scenery/scenes/scene.c

@@ -0,0 +1,8 @@
+#include "scene.h"
+#include "../state.h"
+
+
+void switch_to(State *state, Scene *(*scene_func)(State *)) {
+    state->next_scene = scene_func(state);
+    state->is_scene_switching = true;
+}

apps/scenery/scenes/scene.h

@@ -0,0 +1,16 @@
+#ifndef SCENE_H
+#define SCENE_H
+
+
+typedef struct State State;
+typedef struct Scene {
+    char *id;
+    void (*tick)(State *);
+    void (*end)(State *);
+} Scene;
+
+
+void switch_to(State *state, Scene *(*scene_func)(State *));
+
+
+#endif

apps/scenery/scenes/title.c

@@ -0,0 +1,64 @@
+#include "title.h"
+#include "ingame.h"
+
+#include "twn_game_api.h"
+
+#include <stdio.h>
+
+
+static void title_tick(State *state) {
+    SceneTitle *scn = (SceneTitle *)state->scene;
+    (void)scn;
+
+    if (input_is_action_just_pressed(&state->ctx->input, "ui_accept")) {
+        switch_to(state, ingame_scene);
+    }
+
+
+    m_sprite("/assets/title.png", ((Rect) {
+            ((float)RENDER_BASE_WIDTH / 2) - ((float)320 / 2), 64, 320, 128 }));
+    
+    
+    /* draw the tick count as an example of dynamic text */
+    size_t text_str_len = snprintf(NULL, 0, "%lu", state->ctx->tick_count) + 1;
+    char *text_str = cmalloc(text_str_len);
+    snprintf(text_str, text_str_len, "%lu", state->ctx->tick_count);
+
+    const char *font = "fonts/kenney-pixel.ttf";
+    int text_h = 32;
+    int text_w = text_get_width(text_str, text_h, font);
+
+    push_rectangle(
+        (Rect) {
+            .x = 0,
+            .y = 0,
+            .w = (float)text_w,
+            .h = (float)text_h,
+        },
+        (Color) { 0, 0, 0, 255 }
+    );
+    push_text(
+        text_str,
+        (Vec2){ 0, 0 },
+        text_h,
+        (Color) { 255, 255, 255, 255 },
+        font
+    );
+    free(text_str);
+}
+
+
+static void title_end(State *state) {
+    free(state->scene);
+}
+
+
+Scene *title_scene(State *state) {
+    (void)state;
+
+    SceneTitle *new_scene = ccalloc(1, sizeof *new_scene);
+    new_scene->base.tick = title_tick;
+    new_scene->base.end = title_end;
+
+    return (Scene *)new_scene;
+}

apps/scenery/scenes/title.h

@@ -0,0 +1,16 @@
+#ifndef TITLE_H
+#define TITLE_H
+
+#include "../state.h"
+#include "scene.h"
+
+
+typedef struct SceneTitle {
+    Scene base;
+} SceneTitle;
+
+
+Scene *title_scene(State *state);
+
+
+#endif