580 lines
22 KiB
C
580 lines
22 KiB
C
#include "raylib.h"
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#include "rcamera.h"
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#include "raymath.h"
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#include <stdbool.h>
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#include <stddef.h>
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//----------------------------------------------------------------------------------
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// Defines and Macros
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//----------------------------------------------------------------------------------
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// Movement constants
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#define GRAVITY 32.0f
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#define MAX_SPEED 20.0f
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#define CROUCH_SPEED 5.0f
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#define JUMP_FORCE 12.0f
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#define MAX_ACCEL 150.0f
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// Grounded drag
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#define FRICTION 0.86f
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// Increasing air drag, increases strafing speed
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#define AIR_DRAG 0.98f
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// Responsiveness for turning movement direction to looked direction
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#define CONTROL 15.0f
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#define CROUCH_HEIGHT 0.0f
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#define STAND_HEIGHT 2.0f
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#define BOTTOM_HEIGHT 0.5f
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// Additional definitions
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#define NORMALIZE_INPUT 0
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#define ARRLEN(a) (sizeof(a) / sizeof((a)[0]))
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enum game_state {
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STATE_MENU, // 0 by default
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STATE_GAME, // 1
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};
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//----------------------------------------------------------------------------------
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//Defining program structure
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//----------------------------------------------------------------------------------
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//bob
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typedef struct
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{
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Camera camera; // <- now part of the game state
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Model model; // you can keep model & its position here too
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Vector3 position;
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Vector3 velocity;
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Vector3 dir;
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Vector2 sensitivity;
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Vector2 lookRotation;
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Vector2 lean;
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float headTimer;
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float walkLerp;
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float headLerp;
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bool isGrounded;
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int cameraMode;
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} Player;
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typedef struct
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{
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int index;
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enum game_state state;
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int shouldExit;
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Player player;
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} Master;
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// GLSL 330 core fragment shader (desktop)
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// Discards fragments with alpha below a threshold so depth is only written on real pixels.
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static const char *ALPHA_CLIP_FS =
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"#version 330 core\n"
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"in vec2 fragTexCoord;\n"
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"in vec4 fragColor;\n"
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"uniform sampler2D texture0;\n"
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"uniform float u_alphaCutoff; // e.g., 0.3\n"
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"out vec4 finalColor;\n"
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"void main(){\n"
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" vec4 texel = texture(texture0, fragTexCoord);\n"
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" if(texel.a < u_alphaCutoff) discard;\n"
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" finalColor = texel * fragColor;\n"
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"}\n";
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//------------------------------------------------------------------------------------
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// Function Initation
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//------------------------------------------------------------------------------------
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void Simple_Center_Box(double percent_verticle_gap, double percent_horizontal_gap, int screenWidth, int screenHeight, Color color);
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void Thick_Center_Box(double percent_verticle_gap, double percent_horizontal_gap, float line_width, int screenWidth, int screenHeight, Color color);
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void Simple_Menu(const char *array[], int count, int index, int x1, int y1, int total_width, int total_height, int line_thickess, int font_size, Color color, Color alt_color);
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void UpdateBody(Master* g, float rot, char side, char forward, bool jumpPressed, bool crouchHold);
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static void UpdateCameraAngle(Master* g);
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static void DrawLevel(Model mdlTile);
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static void CenterMouseAndFlush(void);
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//------------------------------------------------------------------------------------
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// Program main entry point
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//------------------------------------------------------------------------------------
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int main(void)
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{
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// Initialization
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//--------------------------------------------------------------------------------------
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//Define window size, create window, establish fps target, fullscreen.
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const int screenWidth = 1440*2;
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const int screenHeight = 960*2;
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InitWindow(screenWidth, screenHeight, "raylib");
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SetTargetFPS(60); // Set our game to run at 60 frames-per-second
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ToggleFullscreen();
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CenterMouseAndFlush();
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DisableCursor(); // Limit cursor to relative movement inside the window
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//Define menu characteristics
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const char *menu[] = {"Game", "Option 2", "Exit"};
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int index_length = ARRLEN(menu);
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//General game state initiation
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Master g = (Master){0};
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g.index = 0;
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g.state = STATE_MENU;
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g.shouldExit = 0;
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//Define
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g.player.sensitivity = (Vector2){ 0.001f, 0.001f };
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g.player.lookRotation = (Vector2){ 0 };
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g.player.headTimer = 0.0f;
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g.player.walkLerp = 0.0f;
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g.player.headLerp = STAND_HEIGHT;
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g.player.lean = (Vector2){ 0 };
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//Define the player camera
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g.player.camera = (Camera){0};
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g.player.camera.position = (Vector3){
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g.player.position.x,
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g.player.position.y + (BOTTOM_HEIGHT + g.player.headLerp),
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g.player.position.z,
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};
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//g.player.camera.target = (Vector3){ 0.0f, 0.0f, 1.0f }; // Camera target
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g.player.camera.up = (Vector3){ 0.0f, 1.0f, 0.0f }; // Up vector
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g.player.camera.fovy = 60.0f;
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g.player.camera.projection = CAMERA_PERSPECTIVE;
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g.player.cameraMode = CAMERA_FIRST_PERSON;
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UpdateCameraAngle(&g);
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// Load GLTF model (no animations)
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//Model model = LoadModel("resources/3d_models/bad_sphere.glb");
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//Vector3 position = { 0.0f, 0.0f, 0.0f };
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// Load a 2D image as texture for the billboard
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//Billboards always point toward the active camera.
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Texture2D sign = LoadTexture("resources/sprites/diard-charles.jpg");
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GenTextureMipmaps(&sign);
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SetTextureFilter(sign, TEXTURE_FILTER_BILINEAR); // optional but looks nicer
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Vector3 bbPos = (Vector3){ 1.0f, 2.5f, 1.0f }; // where in 3D world to place it
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float bbSize = 5.0f; // billboard height in world units
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// Load a 2D image as texture for the billboard
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//Billboards always point toward the active camera.
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Texture2D tree = LoadTexture("resources/sprites/tree.png");
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GenTextureMipmaps(&tree);
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SetTextureFilter(tree, TEXTURE_FILTER_BILINEAR); // optional but looks nicer
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Vector3 treepos = (Vector3){ 0.0f, 7.0f, 0.0f }; // where in 3D world to place it
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float treeSize = 15.0f; // billboard height in world units
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// --- Grass tile setup ---
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Texture2D texGrass = LoadTexture("resources/textures/grass_textures/Grass_01.png"); // adjust path
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GenTextureMipmaps(&texGrass);
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SetTextureFilter(texGrass, TEXTURE_FILTER_TRILINEAR); // nicer at angles
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SetTextureWrap(texGrass, TEXTURE_WRAP_REPEAT);
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// A 3D plane (centered at origin) of size tileSize x tileSize
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const float tileSize = 5.0f; // match your DrawLevel tileSize
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Mesh meshTile = GenMeshPlane(tileSize, tileSize, 1, 1);
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Model mdlTile = LoadModelFromMesh(meshTile);
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mdlTile.materials[0].maps[MATERIAL_MAP_ALBEDO].texture = texGrass;
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Shader shAlphaClip = LoadShaderFromMemory(NULL, ALPHA_CLIP_FS);
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int locCutoff = GetShaderLocation(shAlphaClip, "u_alphaCutoff");
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float cutoff = 0.3f; // tweak to taste; 0.3–0.5 works well for tree PNGs
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SetShaderValue(shAlphaClip, locCutoff, &cutoff, SHADER_UNIFORM_FLOAT);
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//--------------------------------------------------------------------------------------
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// Main game loop
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//--------------------------------------------------------------------------------------
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while (!g.shouldExit && !WindowShouldClose()) // Detect window close button or ESC key
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{
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// Update
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//----------------------------------------------------------------------------------
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switch (g.state)
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{
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case STATE_MENU:
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{
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if (IsKeyPressed(KEY_UP) && g.index > 0)
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{
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g.index -= 1;
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break;
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};
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if (IsKeyPressed(KEY_DOWN) && g.index < index_length - 1)
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{
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g.index += 1;
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break;
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};
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if (IsKeyPressed(KEY_ENTER))
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{
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switch (g.index)
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{
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case 0:
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{
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g.state = 1;
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CenterMouseAndFlush();
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break;
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}
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case 1:
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{
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break;
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}
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case 2:
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{
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g.shouldExit = 1;
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break;
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}
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}
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};
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break;
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};
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case STATE_GAME:
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{
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Vector2 mouseDelta = GetMouseDelta();
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g.player.lookRotation.x -= mouseDelta.x*g.player.sensitivity.x;
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g.player.lookRotation.y += mouseDelta.y*g.player.sensitivity.y;
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char sideway = (IsKeyDown(KEY_D) - IsKeyDown(KEY_A));
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char forward = (IsKeyDown(KEY_W) - IsKeyDown(KEY_S));
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bool crouching = IsKeyDown(KEY_LEFT_CONTROL);
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UpdateBody(&g, g.player.lookRotation.x, sideway, forward, IsKeyDown(KEY_SPACE), crouching);
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float delta = GetFrameTime();
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g.player.headLerp = Lerp(g.player.headLerp, (crouching ? CROUCH_HEIGHT : STAND_HEIGHT), 20.0f*delta);
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g.player.camera.position = (Vector3){
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g.player.position.x,
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g.player.position.y + (BOTTOM_HEIGHT + g.player.headLerp),
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g.player.position.z,
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};
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if (g.player.isGrounded && ((forward != 0) || (sideway != 0)))
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{
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g.player.headTimer += delta*3.0f;
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g.player.walkLerp = Lerp(g.player.walkLerp, 1.0f, 10.0f*delta);
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g.player.camera.fovy = Lerp(g.player.camera.fovy, 55.0f, 5.0f*delta);
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}
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else
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{
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g.player.walkLerp = Lerp(g.player.walkLerp, 0.0f, 10.0f*delta);
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g.player.camera.fovy = Lerp(g.player.camera.fovy, 60.0f, 5.0f*delta);
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}
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g.player.lean.x = Lerp(g.player.lean.x, sideway*0.02f, 10.0f*delta);
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g.player.lean.y = Lerp(g.player.lean.y, forward*0.015f, 10.0f*delta);
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UpdateCameraAngle(&g);
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int bbdifx = g.player.position.x - bbPos.x;
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int bbdifz = g.player.position.z - bbPos.z;
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bbPos.x += 0.01 * bbdifx;
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bbPos.z += 0.01 * bbdifz;
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treepos = (Vector3){ 0.0f, 7.0f, 0.0f };
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break;
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};
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}
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//----------------------------------------------------------------------------------
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// Draw
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//----------------------------------------------------------------------------------
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BeginDrawing();
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switch (g.state)
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{
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case STATE_MENU:
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{
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ClearBackground(BLACK);
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Simple_Menu(menu, ARRLEN(menu), g.index, screenWidth * 0.15, screenHeight * 0.15, 500, screenHeight * 0.7, 10, 50, GREEN, LIGHTGRAY);
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Thick_Center_Box(0.1, 0.1, 10, screenWidth, screenHeight, GREEN);
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break;
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}
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case STATE_GAME:
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{
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ClearBackground(BLACK);
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BeginMode3D(g.player.camera);
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DrawLevel(mdlTile);
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BeginShaderMode(shAlphaClip);
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{
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// Draw your trees here with DrawBillboard / DrawBillboardPro
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// Example using your positions:
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DrawBillboard(g.player.camera, tree, treepos, treeSize, WHITE);
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Vector3 p = treepos;
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p.x += 3*5; p.z += 3*5; DrawBillboard(g.player.camera, tree, p, treeSize, WHITE);
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p.x += 5*5; p.z += -2*5; DrawBillboard(g.player.camera, tree, p, treeSize, WHITE);
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p.x += -4*5; p.z += 3*5; DrawBillboard(g.player.camera, tree, p, treeSize, WHITE);
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p.x += 9*5; p.z += 10*5; DrawBillboard(g.player.camera, tree, p, treeSize, WHITE);
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// Your sign as a cutout too (if it has a clean alpha)
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}
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EndShaderMode();
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DrawBillboard(g.player.camera, sign, bbPos, bbSize, WHITE);
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EndMode3D();
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// Draw info box
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DrawRectangle(5, 5, 330, 75, Fade(SKYBLUE, 0.5f));
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DrawRectangleLines(5, 5, 330, 75, BLUE);
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DrawText("Camera controls:", 15, 15, 10, BLACK);
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DrawText("- Move keys: W, A, S, D, Space, Left-Ctrl", 15, 30, 10, BLACK);
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DrawText("- Look around: arrow keys or mouse", 15, 45, 10, BLACK);
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DrawText(TextFormat("- Velocity Len: (%06.3f)", Vector2Length((Vector2){ g.player.velocity.x, g.player.velocity.z })), 15, 60, 10, BLACK);
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break;
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}
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}
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EndDrawing();
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//----------------------------------------------------------------------------------
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};
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//--------------------------------------------------------------------------------------
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// De-Initialization
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//--------------------------------------------------------------------------------------
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// Detach the texture from the model so UnloadModel won't try to free it.
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mdlTile.materials[0].maps[MATERIAL_MAP_ALBEDO].texture = (Texture2D){0};
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// Now free resources you loaded:
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UnloadModel(mdlTile); // frees the model and its mesh/VBOs
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UnloadTexture(texGrass); // frees the grass texture you loaded
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UnloadTexture(sign); // frees billboard texture
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UnloadTexture(tree); // frees tree texture
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CloseWindow(); // Close window and OpenGL context
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//--------------------------------------------------------------------------------------
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return 0;
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};
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//------------------------------------------------------------------------------------
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// Function Definitions
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//------------------------------------------------------------------------------------
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//Function creates a simple box outline centered in the screen with a symetric ofset from the screen borders.
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void Simple_Center_Box(double percent_verticle_gap, double percent_horizontal_gap, int screenWidth, int screenHeight, Color color)
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{
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int x1 = percent_horizontal_gap * screenWidth;
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int y1 = percent_verticle_gap * screenHeight;
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int w = screenWidth * (1 - (2 * percent_horizontal_gap));
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int h = screenHeight * (1 - (2 * percent_verticle_gap));
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DrawRectangleLines(x1, y1, w, h, color);
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}
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//Function creates a thick walled box outline centered in the screen with a symetric ofset from the screen borders.
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void Thick_Center_Box(double percent_verticle_gap, double percent_horizontal_gap, float line_width, int screenWidth, int screenHeight, Color color)
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{
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int x1 = percent_horizontal_gap * screenWidth;
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int y1 = percent_verticle_gap * screenHeight;
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int w = screenWidth * (1 - (2 * percent_horizontal_gap));
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int h = screenHeight * (1 - (2 * percent_verticle_gap));
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struct Rectangle rec = {x1,y1,w,h};
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DrawRectangleLinesEx(rec, line_width, color);
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}
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//Make a simple menu with selection features
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void Simple_Menu(const char *array[], int count, int index, int x1, int y1, int total_width, int total_height, int line_thickess, int font_size, Color color, Color alt_color)
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{
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float height = 0.8f * total_height;
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int space = 0.2 * total_height / (count - 1);
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struct Rectangle rec = {x1,y1,total_width,(float)height/count};
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for (int i = 0; i < count; ++i)
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{
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int text_width = MeasureText(array[i], font_size);
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if(i == index)
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{
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DrawRectangleLinesEx(rec, line_thickess, alt_color);
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DrawText(array[i], rec.x + (((total_width - 2.0 * line_thickess) - text_width)/2), rec.y + (height/count/2) - font_size/2.0f, font_size, alt_color);
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}
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else
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{
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DrawRectangleLinesEx(rec, line_thickess, color);
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DrawText(array[i], rec.x + (((total_width - 2.0 * line_thickess) - text_width)/2), rec.y + (height/count/2) - font_size/2.0f, font_size, color);
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}
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rec.y = rec.y + (float)height/count + space;
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}
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}
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void UpdateBody(Master* g, float rot, char side, char forward, bool jumpPressed, bool crouchHold)
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{
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Vector2 input = (Vector2){ (float)side, (float)-forward };
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#if defined(NORMALIZE_INPUT)
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// Slow down diagonal movement
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if ((side != 0) && (forward != 0)) input = Vector2Normalize(input);
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#endif
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float delta = GetFrameTime();
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if (!g->player.isGrounded) g->player.velocity.y -= GRAVITY*delta;
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if (g->player.isGrounded && jumpPressed)
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{
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g->player.velocity.y = JUMP_FORCE;
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g->player.isGrounded = false;
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// Sound can be played at this moment
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//SetSoundPitch(fxJump, 1.0f + (GetRandomValue(-100, 100)*0.001));
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//PlaySound(fxJump);
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}
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Vector3 front = (Vector3){ sin(rot), 0.f, cos(rot) };
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Vector3 right = (Vector3){ cos(-rot), 0.f, sin(-rot) };
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Vector3 desiredDir = (Vector3){ input.x*right.x + input.y*front.x, 0.0f, input.x*right.z + input.y*front.z, };
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g->player.dir = Vector3Lerp(g->player.dir, desiredDir, CONTROL*delta);
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float decel = (g->player.isGrounded ? FRICTION : AIR_DRAG);
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Vector3 hvel = (Vector3){ g->player.velocity.x*decel, 0.0f, g->player.velocity.z*decel };
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float hvelLength = Vector3Length(hvel); // Magnitude
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if (hvelLength < (MAX_SPEED*0.01f)) hvel = (Vector3){ 0 };
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// This is what creates strafing
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float speed = Vector3DotProduct(hvel, g->player.dir);
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// Whenever the amount of acceleration to add is clamped by the maximum acceleration constant,
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// a Player can make the speed faster by bringing the direction closer to horizontal velocity angle
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// More info here: https://youtu.be/v3zT3Z5apaM?t=165
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float maxSpeed = (crouchHold? CROUCH_SPEED : MAX_SPEED);
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float accel = Clamp(maxSpeed - speed, 0.f, MAX_ACCEL*delta);
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hvel.x += g->player.dir.x*accel;
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hvel.z += g->player.dir.z*accel;
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g->player.velocity.x = hvel.x;
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g->player.velocity.z = hvel.z;
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g->player.position.x += g->player.velocity.x*delta;
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g->player.position.y += g->player.velocity.y*delta;
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g->player.position.z += g->player.velocity.z*delta;
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// Fancy collision system against the floor
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if (g->player.position.y <= 0.0f)
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{
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g->player.position.y = 0.0f;
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g->player.velocity.y = 0.0f;
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g->player.isGrounded = true; // Enable jumping
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}
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}
|
||
|
||
// Update camera
|
||
static void UpdateCameraAngle(Master* g)
|
||
{
|
||
const Vector3 up = (Vector3){ 0.0f, 1.0f, 0.0f };
|
||
const Vector3 targetOffset = (Vector3){ 0.0f, 0.0f, -1.0f };
|
||
|
||
// Left and right
|
||
Vector3 yaw = Vector3RotateByAxisAngle(targetOffset, up, g->player.lookRotation.x);
|
||
|
||
// Clamp view up
|
||
float maxAngleUp = Vector3Angle(up, yaw);
|
||
maxAngleUp -= 0.001f; // Avoid numerical errors
|
||
if ( -(g->player.lookRotation.y) > maxAngleUp) { g->player.lookRotation.y = -maxAngleUp; }
|
||
|
||
// Clamp view down
|
||
float maxAngleDown = Vector3Angle(Vector3Negate(up), yaw);
|
||
maxAngleDown *= -1.0f; // Downwards angle is negative
|
||
maxAngleDown += 0.001f; // Avoid numerical errors
|
||
if ( -(g->player.lookRotation.y) < maxAngleDown) { g->player.lookRotation.y = -maxAngleDown; }
|
||
|
||
// Up and down
|
||
Vector3 right = Vector3Normalize(Vector3CrossProduct(yaw, up));
|
||
|
||
// Rotate view vector around right axis
|
||
float pitchAngle = -g->player.lookRotation.y -
|
||
g->player.lean.y;
|
||
pitchAngle = Clamp(pitchAngle, -PI / 2 + 0.0001f, PI / 2 - 0.0001f); // Clamp angle so it doesn't go past straight up or straight down
|
||
Vector3 pitch = Vector3RotateByAxisAngle(yaw, right, pitchAngle);
|
||
|
||
// Head animation
|
||
// Rotate up direction around forward axis
|
||
float headSin = sin(g->player.headTimer*PI);
|
||
float headCos = cos(g->player.headTimer*PI);
|
||
const float stepRotation = 0.005f;
|
||
g->player.camera.up = Vector3RotateByAxisAngle(up, pitch, headSin*stepRotation + g->player.lean.x);
|
||
|
||
// Camera BOB
|
||
const float bobSide = 0.01f;
|
||
const float bobUp = 0.01f;
|
||
Vector3 bobbing = Vector3Scale(right, headSin*bobSide);
|
||
bobbing.y = fabsf(headCos*bobUp);
|
||
|
||
g->player.camera.position = Vector3Add(g->player.camera.position, Vector3Scale(bobbing, g->player.walkLerp));
|
||
g->player.camera.target = Vector3Add(g->player.camera.position, pitch);
|
||
}
|
||
|
||
// Draw game level
|
||
static void DrawLevel(Model mdlTile)
|
||
{
|
||
const int floorExtent = 25;
|
||
const float tileSize = 5.0f;
|
||
const Color tileColor1 = (Color){ 150, 200, 200, 255 };
|
||
|
||
// Floor tiles
|
||
for (int y = -floorExtent; y < floorExtent; y++)
|
||
{
|
||
for (int x = -floorExtent; x < floorExtent; x++)
|
||
{
|
||
/*
|
||
if ((y & 1) && (x & 1))
|
||
{
|
||
DrawPlane((Vector3){ x*tileSize, 0.0f, y*tileSize}, (Vector2){ tileSize, tileSize }, tileColor1);
|
||
}
|
||
else if (!(y & 1) && !(x & 1))
|
||
{
|
||
DrawPlane((Vector3){ x*tileSize, 0.0f, y*tileSize}, (Vector2){ tileSize, tileSize }, LIGHTGRAY);
|
||
}
|
||
*/
|
||
Vector3 pos = (Vector3){ x*tileSize, 0.0f, y*tileSize };
|
||
// mdlTile must be accessible here: make it global/static or pass it in
|
||
DrawModel(mdlTile, pos, 1.0f, WHITE);
|
||
|
||
}
|
||
}
|
||
|
||
/*
|
||
const Vector3 towerSize = (Vector3){ 16.0f, 32.0f, 16.0f };
|
||
const Color towerColor = (Color){ 150, 200, 200, 255 };
|
||
|
||
Vector3 towerPos = (Vector3){ 16.0f, 16.0f, 16.0f };
|
||
DrawCubeV(towerPos, towerSize, towerColor);
|
||
DrawCubeWiresV(towerPos, towerSize, DARKBLUE);
|
||
|
||
towerPos.x *= -1;
|
||
DrawCubeV(towerPos, towerSize, towerColor);
|
||
DrawCubeWiresV(towerPos, towerSize, DARKBLUE);
|
||
|
||
towerPos.z *= -1;
|
||
DrawCubeV(towerPos, towerSize, towerColor);
|
||
DrawCubeWiresV(towerPos, towerSize, DARKBLUE);
|
||
|
||
towerPos.x *= -1;
|
||
DrawCubeV(towerPos, towerSize, towerColor);
|
||
DrawCubeWiresV(towerPos, towerSize, DARKBLUE);
|
||
|
||
// Red sun
|
||
DrawSphere((Vector3){ 300.0f, 300.0f, 0.0f }, 100.0f, (Color){ 255, 0, 0, 255 });
|
||
*/
|
||
}
|
||
|
||
//fix mouse
|
||
static void CenterMouseAndFlush() {
|
||
SetMousePosition(GetRenderWidth()/2, GetRenderHeight()/2);
|
||
(void)GetMouseDelta();
|
||
} |