336 lines
13 KiB
C#
336 lines
13 KiB
C#
/*******************************************************************************************
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*
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* raylib [models] example - textured cube
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*
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* Example complexity rating: [★★☆☆] 2/4
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*
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* Example originally created with raylib 4.5, last time updated with raylib 4.5
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*
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* Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
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* BSD-like license that allows static linking with closed source software
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*
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* Copyright (c) 2022-2025 Ramon Santamaria (@raysan5)
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*
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********************************************************************************************/
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using System.Numerics;
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using static Raylib_cs.Raylib;
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namespace Examples.Models;
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public partial class ModelCubeTexture : IExample
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{
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private const int screenWidth = 800;
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private const int screenHeight = 450;
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public string Name => "Models / Model Cube Texture";
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public string Title => "raylib [models] example - textured cube";
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private Camera3D camera;
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private Texture2D texture;
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public void Init()
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{
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// Define the camera to look into our 3d world
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camera = new();
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camera.Position = new Vector3(0.0f, 10.0f, 10.0f);
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camera.Target = new Vector3(0.0f, 0.0f, 0.0f);
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camera.Up = new Vector3(0.0f, 1.0f, 0.0f);
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camera.FovY = 45.0f;
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camera.Projection = CameraProjection.Perspective;
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// Load texture to be applied to the cubes sides
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texture = LoadTexture("resources/cubicmap_atlas.png");
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}
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public void Update()
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{
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// Draw
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//----------------------------------------------------------------------------------
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BeginDrawing();
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ClearBackground(Color.RayWhite);
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BeginMode3D(camera);
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// Draw cube with an applied texture
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DrawCubeTexture(texture, new Vector3(-2.0f, 2.0f, 0.0f), 2.0f, 4.0f, 2.0f, Color.White);
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// Draw cube with an applied texture, but only a defined rectangle piece of the texture
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DrawCubeTextureRec(
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texture,
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new Rectangle(0, texture.Height / 2, texture.Width / 2, texture.Height / 2),
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new Vector3(2.0f, 1.0f, 0.0f),
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2.0f,
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2.0f,
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2.0f,
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Color.White
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);
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DrawGrid(10, 1.0f);
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EndMode3D();
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EndDrawing();
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//----------------------------------------------------------------------------------
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}
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public void Unload()
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{
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UnloadTexture(texture);
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}
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// Draw cube textured
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// NOTE: Cube position is the center position
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private static void DrawCubeTexture(
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Texture2D texture,
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Vector3 position,
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float width,
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float height,
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float length,
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Color color
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)
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{
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var x = position.X;
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var y = position.Y;
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var z = position.Z;
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// Set desired texture to be enabled while drawing following vertex data
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Rlgl.SetTexture(texture.Id);
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// Vertex data transformation can be defined with the commented lines,
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// but in this example we calculate the transformed vertex data directly when calling Rlgl.Vertex3f()
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// Rlgl.PushMatrix();
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// NOTE: Transformation is applied in inverse order (scale -> rotate -> translate)
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// Rlgl.Translatef(2.0f, 0.0f, 0.0f);
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// Rlgl.Rotatef(45, 0, 1, 0);
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// Rlgl.Scalef(2.0f, 2.0f, 2.0f);
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Rlgl.Begin(DrawMode.Quads);
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Rlgl.Color4ub(color.R, color.G, color.B, color.A);
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// Front Face
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// Normal Pointing Towards Viewer
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Rlgl.Normal3f(0.0f, 0.0f, 1.0f);
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Rlgl.TexCoord2f(0.0f, 0.0f);
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// Bottom Left Of The Texture and Quad
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Rlgl.Vertex3f(x - width / 2, y - height / 2, z + length / 2);
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Rlgl.TexCoord2f(1.0f, 0.0f);
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// Bottom Right Of The Texture and Quad
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Rlgl.Vertex3f(x + width / 2, y - height / 2, z + length / 2);
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Rlgl.TexCoord2f(1.0f, 1.0f);
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// Top Right Of The Texture and Quad
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Rlgl.Vertex3f(x + width / 2, y + height / 2, z + length / 2);
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Rlgl.TexCoord2f(0.0f, 1.0f);
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// Top Left Of The Texture and Quad
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Rlgl.Vertex3f(x - width / 2, y + height / 2, z + length / 2);
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// Back Face
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// Normal Pointing Away From Viewer
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Rlgl.Normal3f(0.0f, 0.0f, -1.0f);
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Rlgl.TexCoord2f(1.0f, 0.0f);
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// Bottom Right Of The Texture and Quad
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Rlgl.Vertex3f(x - width / 2, y - height / 2, z - length / 2);
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Rlgl.TexCoord2f(1.0f, 1.0f);
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// Top Right Of The Texture and Quad
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Rlgl.Vertex3f(x - width / 2, y + height / 2, z - length / 2);
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Rlgl.TexCoord2f(0.0f, 1.0f);
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// Top Left Of The Texture and Quad
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Rlgl.Vertex3f(x + width / 2, y + height / 2, z - length / 2);
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Rlgl.TexCoord2f(0.0f, 0.0f);
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// Bottom Left Of The Texture and Quad
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Rlgl.Vertex3f(x + width / 2, y - height / 2, z - length / 2);
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// Top Face
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// Normal Pointing Up
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Rlgl.Normal3f(0.0f, 1.0f, 0.0f);
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Rlgl.TexCoord2f(0.0f, 1.0f);
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// Top Left Of The Texture and Quad
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Rlgl.Vertex3f(x - width / 2, y + height / 2, z - length / 2);
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Rlgl.TexCoord2f(0.0f, 0.0f);
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// Bottom Left Of The Texture and Quad
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Rlgl.Vertex3f(x - width / 2, y + height / 2, z + length / 2);
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Rlgl.TexCoord2f(1.0f, 0.0f);
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// Bottom Right Of The Texture and Quad
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Rlgl.Vertex3f(x + width / 2, y + height / 2, z + length / 2);
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Rlgl.TexCoord2f(1.0f, 1.0f);
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// Top Right Of The Texture and Quad
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Rlgl.Vertex3f(x + width / 2, y + height / 2, z - length / 2);
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// Bottom Face
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// Normal Pointing Down
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Rlgl.Normal3f(0.0f, -1.0f, 0.0f);
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Rlgl.TexCoord2f(1.0f, 1.0f);
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// Top Right Of The Texture and Quad
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Rlgl.Vertex3f(x - width / 2, y - height / 2, z - length / 2);
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Rlgl.TexCoord2f(0.0f, 1.0f);
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// Top Left Of The Texture and Quad
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Rlgl.Vertex3f(x + width / 2, y - height / 2, z - length / 2);
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Rlgl.TexCoord2f(0.0f, 0.0f);
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// Bottom Left Of The Texture and Quad
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Rlgl.Vertex3f(x + width / 2, y - height / 2, z + length / 2);
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Rlgl.TexCoord2f(1.0f, 0.0f);
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// Bottom Right Of The Texture and Quad
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Rlgl.Vertex3f(x - width / 2, y - height / 2, z + length / 2);
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// Right face
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// Normal Pointing Right
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Rlgl.Normal3f(1.0f, 0.0f, 0.0f);
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Rlgl.TexCoord2f(1.0f, 0.0f);
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// Bottom Right Of The Texture and Quad
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Rlgl.Vertex3f(x + width / 2, y - height / 2, z - length / 2);
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Rlgl.TexCoord2f(1.0f, 1.0f);
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// Top Right Of The Texture and Quad
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Rlgl.Vertex3f(x + width / 2, y + height / 2, z - length / 2);
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Rlgl.TexCoord2f(0.0f, 1.0f);
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// Top Left Of The Texture and Quad
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Rlgl.Vertex3f(x + width / 2, y + height / 2, z + length / 2);
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Rlgl.TexCoord2f(0.0f, 0.0f);
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// Bottom Left Of The Texture and Quad
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Rlgl.Vertex3f(x + width / 2, y - height / 2, z + length / 2);
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// Left Face
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// Normal Pointing Left
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Rlgl.Normal3f(-1.0f, 0.0f, 0.0f);
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Rlgl.TexCoord2f(0.0f, 0.0f);
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// Bottom Left Of The Texture and Quad
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Rlgl.Vertex3f(x - width / 2, y - height / 2, z - length / 2);
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Rlgl.TexCoord2f(1.0f, 0.0f);
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// Bottom Right Of The Texture and Quad
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Rlgl.Vertex3f(x - width / 2, y - height / 2, z + length / 2);
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Rlgl.TexCoord2f(1.0f, 1.0f);
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// Top Right Of The Texture and Quad
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Rlgl.Vertex3f(x - width / 2, y + height / 2, z + length / 2);
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Rlgl.TexCoord2f(0.0f, 1.0f);
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// Top Left Of The Texture and Quad
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Rlgl.Vertex3f(x - width / 2, y + height / 2, z - length / 2);
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Rlgl.End();
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//rlPopMatrix();
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Rlgl.SetTexture(0);
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}
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// Draw cube with texture piece applied to all faces
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private static void DrawCubeTextureRec(
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Texture2D texture,
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Rectangle source,
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Vector3 position,
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float width,
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float height,
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float length,
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Color color
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)
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{
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var x = position.X;
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var y = position.Y;
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var z = position.Z;
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var texWidth = (float)texture.Width;
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var texHeight = (float)texture.Height;
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// Set desired texture to be enabled while drawing following vertex data
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Rlgl.SetTexture(texture.Id);
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// We calculate the normalized texture coordinates for the desired texture-source-rectangle
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// It means converting from (tex.Width, tex.Height) coordinates to [0.0f, 1.0f] equivalent
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Rlgl.Begin(DrawMode.Quads);
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Rlgl.Color4ub(color.R, color.G, color.B, color.A);
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// Front face
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Rlgl.Normal3f(0.0f, 0.0f, 1.0f);
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Rlgl.TexCoord2f(source.X / texWidth, (source.Y + source.Height) / texHeight);
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Rlgl.Vertex3f(x - width / 2, y - height / 2, z + length / 2);
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Rlgl.TexCoord2f((source.X + source.Width) / texWidth, (source.Y + source.Height) / texHeight);
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Rlgl.Vertex3f(x + width / 2, y - height / 2, z + length / 2);
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Rlgl.TexCoord2f((source.X + source.Width) / texWidth, source.Y / texHeight);
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Rlgl.Vertex3f(x + width / 2, y + height / 2, z + length / 2);
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Rlgl.TexCoord2f(source.X / texWidth, source.Y / texHeight);
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Rlgl.Vertex3f(x - width / 2, y + height / 2, z + length / 2);
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// Back face
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Rlgl.Normal3f(0.0f, 0.0f, -1.0f);
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Rlgl.TexCoord2f((source.X + source.Width) / texWidth, (source.Y + source.Height) / texHeight);
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Rlgl.Vertex3f(x - width / 2, y - height / 2, z - length / 2);
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Rlgl.TexCoord2f((source.X + source.Width) / texWidth, source.Y / texHeight);
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Rlgl.Vertex3f(x - width / 2, y + height / 2, z - length / 2);
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Rlgl.TexCoord2f(source.X / texWidth, source.Y / texHeight);
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Rlgl.Vertex3f(x + width / 2, y + height / 2, z - length / 2);
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Rlgl.TexCoord2f(source.X / texWidth, (source.Y + source.Height) / texHeight);
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Rlgl.Vertex3f(x + width / 2, y - height / 2, z - length / 2);
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// Top face
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Rlgl.Normal3f(0.0f, 1.0f, 0.0f);
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Rlgl.TexCoord2f(source.X / texWidth, source.Y / texHeight);
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Rlgl.Vertex3f(x - width / 2, y + height / 2, z - length / 2);
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Rlgl.TexCoord2f(source.X / texWidth, (source.Y + source.Height) / texHeight);
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Rlgl.Vertex3f(x - width / 2, y + height / 2, z + length / 2);
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Rlgl.TexCoord2f((source.X + source.Width) / texWidth, (source.Y + source.Height) / texHeight);
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Rlgl.Vertex3f(x + width / 2, y + height / 2, z + length / 2);
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Rlgl.TexCoord2f((source.X + source.Width) / texWidth, source.Y / texHeight);
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Rlgl.Vertex3f(x + width / 2, y + height / 2, z - length / 2);
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// Bottom face
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Rlgl.Normal3f(0.0f, -1.0f, 0.0f);
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Rlgl.TexCoord2f((source.X + source.Width) / texWidth, source.Y / texHeight);
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Rlgl.Vertex3f(x - width / 2, y - height / 2, z - length / 2);
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Rlgl.TexCoord2f(source.X / texWidth, source.Y / texHeight);
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Rlgl.Vertex3f(x + width / 2, y - height / 2, z - length / 2);
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Rlgl.TexCoord2f(source.X / texWidth, (source.Y + source.Height) / texHeight);
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Rlgl.Vertex3f(x + width / 2, y - height / 2, z + length / 2);
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Rlgl.TexCoord2f((source.X + source.Width) / texWidth, (source.Y + source.Height) / texHeight);
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Rlgl.Vertex3f(x - width / 2, y - height / 2, z + length / 2);
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// Right face
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Rlgl.Normal3f(1.0f, 0.0f, 0.0f);
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Rlgl.TexCoord2f((source.X + source.Width) / texWidth, (source.Y + source.Height) / texHeight);
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Rlgl.Vertex3f(x + width / 2, y - height / 2, z - length / 2);
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Rlgl.TexCoord2f((source.X + source.Width) / texWidth, source.Y / texHeight);
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Rlgl.Vertex3f(x + width / 2, y + height / 2, z - length / 2);
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Rlgl.TexCoord2f(source.X / texWidth, source.Y / texHeight);
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Rlgl.Vertex3f(x + width / 2, y + height / 2, z + length / 2);
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Rlgl.TexCoord2f(source.X / texWidth, (source.Y + source.Height) / texHeight);
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Rlgl.Vertex3f(x + width / 2, y - height / 2, z + length / 2);
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// Left face
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Rlgl.Normal3f(-1.0f, 0.0f, 0.0f);
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Rlgl.TexCoord2f(source.X / texWidth, (source.Y + source.Height) / texHeight);
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Rlgl.Vertex3f(x - width / 2, y - height / 2, z - length / 2);
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Rlgl.TexCoord2f((source.X + source.Width) / texWidth, (source.Y + source.Height) / texHeight);
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Rlgl.Vertex3f(x - width / 2, y - height / 2, z + length / 2);
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Rlgl.TexCoord2f((source.X + source.Width) / texWidth, source.Y / texHeight);
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Rlgl.Vertex3f(x - width / 2, y + height / 2, z + length / 2);
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Rlgl.TexCoord2f(source.X / texWidth, source.Y / texHeight);
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Rlgl.Vertex3f(x - width / 2, y + height / 2, z - length / 2);
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Rlgl.End();
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Rlgl.SetTexture(0);
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}
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public static int Main()
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{
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// Initialization
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//--------------------------------------------------------------------------------------
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InitWindow(screenWidth, screenHeight, "raylib [models] example - textured cube");
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SetTargetFPS(60);
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//--------------------------------------------------------------------------------------
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var game = new ModelCubeTexture();
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game.Init();
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// Main game loop
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while (!WindowShouldClose())
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{
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game.Update();
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}
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game.Unload();
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// De-Initialization
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//--------------------------------------------------------------------------------------
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CloseWindow();
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//--------------------------------------------------------------------------------------
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return 0;
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}
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}
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