You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
178 lines
6.8 KiB
178 lines
6.8 KiB
/*******************************************************************************************
|
|
*
|
|
* raylib [shaders] example - lightmap rendering
|
|
*
|
|
* Example complexity rating: [★★★☆] 3/4
|
|
*
|
|
* NOTE: This example requires raylib OpenGL 3.3 or ES2 versions for shaders support,
|
|
* OpenGL 1.1 does not support shaders, recompile raylib to OpenGL 3.3 version
|
|
*
|
|
* NOTE: Shaders used in this example are #version 330 (OpenGL 3.3)
|
|
*
|
|
* Example originally created with raylib 4.5, last time updated with raylib 4.5
|
|
*
|
|
* Example contributed by Jussi Viitala (@nullstare) and reviewed by Ramon Santamaria (@raysan5)
|
|
*
|
|
* Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
|
|
* BSD-like license that allows static linking with closed source software
|
|
*
|
|
* Copyright (c) 2019-2025 Jussi Viitala (@nullstare) and Ramon Santamaria (@raysan5)
|
|
*
|
|
********************************************************************************************/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
|
|
#include "raylib.h"
|
|
#include "raymath.h"
|
|
#include "rlgl.h"
|
|
|
|
#if defined(PLATFORM_DESKTOP)
|
|
#define GLSL_VERSION 330
|
|
#else // PLATFORM_ANDROID, PLATFORM_WEB
|
|
#define GLSL_VERSION 100
|
|
#endif
|
|
|
|
#define MAP_SIZE 10
|
|
|
|
//------------------------------------------------------------------------------------
|
|
// Program main entry point
|
|
//------------------------------------------------------------------------------------
|
|
int main(void)
|
|
{
|
|
// Initialization
|
|
//--------------------------------------------------------------------------------------
|
|
const int screenWidth = 800;
|
|
const int screenHeight = 450;
|
|
|
|
SetConfigFlags(FLAG_MSAA_4X_HINT); // Enable Multi Sampling Anti Aliasing 4x (if available)
|
|
InitWindow(screenWidth, screenHeight, "raylib [shaders] example - lightmap rendering");
|
|
|
|
// Define the camera to look into our 3d world
|
|
Camera camera = { 0 };
|
|
camera.position = (Vector3){ 4.0f, 6.0f, 8.0f }; // Camera position
|
|
camera.target = (Vector3){ 0.0f, 0.0f, 0.0f }; // Camera looking at point
|
|
camera.up = (Vector3){ 0.0f, 1.0f, 0.0f }; // Camera up vector (rotation towards target)
|
|
camera.fovy = 45.0f; // Camera field-of-view Y
|
|
camera.projection = CAMERA_PERSPECTIVE; // Camera projection type
|
|
|
|
Mesh mesh = GenMeshPlane((float)MAP_SIZE, (float)MAP_SIZE, 1, 1);
|
|
|
|
// GenMeshPlane doesn't generate texcoords2 so we will upload them separately
|
|
mesh.texcoords2 = (float *)RL_MALLOC(mesh.vertexCount*2*sizeof(float));
|
|
|
|
// X // Y
|
|
mesh.texcoords2[0] = 0.0f; mesh.texcoords2[1] = 0.0f;
|
|
mesh.texcoords2[2] = 1.0f; mesh.texcoords2[3] = 0.0f;
|
|
mesh.texcoords2[4] = 0.0f; mesh.texcoords2[5] = 1.0f;
|
|
mesh.texcoords2[6] = 1.0f; mesh.texcoords2[7] = 1.0f;
|
|
|
|
// Load a new texcoords2 attributes buffer
|
|
mesh.vboId[SHADER_LOC_VERTEX_TEXCOORD02] = rlLoadVertexBuffer(mesh.texcoords2, mesh.vertexCount*2*sizeof(float), false);
|
|
rlEnableVertexArray(mesh.vaoId);
|
|
|
|
// Index 5 is for texcoords2
|
|
rlSetVertexAttribute(5, 2, RL_FLOAT, 0, 0, 0);
|
|
rlEnableVertexAttribute(5);
|
|
rlDisableVertexArray();
|
|
|
|
// Load lightmap shader
|
|
Shader shader = LoadShader(TextFormat("resources/shaders/glsl%i/lightmap.vs", GLSL_VERSION),
|
|
TextFormat("resources/shaders/glsl%i/lightmap.fs", GLSL_VERSION));
|
|
|
|
Texture texture = LoadTexture("resources/cubicmap_atlas.png");
|
|
Texture light = LoadTexture("resources/spark_flame.png");
|
|
|
|
GenTextureMipmaps(&texture);
|
|
SetTextureFilter(texture, TEXTURE_FILTER_TRILINEAR);
|
|
|
|
RenderTexture lightmap = LoadRenderTexture(MAP_SIZE, MAP_SIZE);
|
|
|
|
SetTextureFilter(lightmap.texture, TEXTURE_FILTER_TRILINEAR);
|
|
|
|
Material material = LoadMaterialDefault();
|
|
material.shader = shader;
|
|
material.maps[MATERIAL_MAP_ALBEDO].texture = texture;
|
|
material.maps[MATERIAL_MAP_METALNESS].texture = lightmap.texture;
|
|
|
|
// Drawing to lightmap
|
|
BeginTextureMode(lightmap);
|
|
ClearBackground(BLACK);
|
|
|
|
BeginBlendMode(BLEND_ADDITIVE);
|
|
DrawTexturePro(
|
|
light,
|
|
(Rectangle){ 0, 0, (float)light.width, (float)light.height },
|
|
(Rectangle){ 0, 0, 20, 20 },
|
|
(Vector2){ 10.0, 10.0 },
|
|
0.0,
|
|
RED
|
|
);
|
|
DrawTexturePro(
|
|
light,
|
|
(Rectangle){ 0, 0, (float)light.width, (float)light.height },
|
|
(Rectangle){ 8, 4, 20, 20 },
|
|
(Vector2){ 10.0, 10.0 },
|
|
0.0,
|
|
BLUE
|
|
);
|
|
DrawTexturePro(
|
|
light,
|
|
(Rectangle){ 0, 0, (float)light.width, (float)light.height },
|
|
(Rectangle){ 8, 8, 10, 10 },
|
|
(Vector2){ 5.0, 5.0 },
|
|
0.0,
|
|
GREEN
|
|
);
|
|
BeginBlendMode(BLEND_ALPHA);
|
|
EndTextureMode();
|
|
|
|
SetTargetFPS(60); // Set our game to run at 60 frames-per-second
|
|
//--------------------------------------------------------------------------------------
|
|
|
|
// Main game loop
|
|
while (!WindowShouldClose()) // Detect window close button or ESC key
|
|
{
|
|
// Update
|
|
//----------------------------------------------------------------------------------
|
|
UpdateCamera(&camera, CAMERA_ORBITAL);
|
|
//----------------------------------------------------------------------------------
|
|
|
|
// Draw
|
|
//----------------------------------------------------------------------------------
|
|
BeginDrawing();
|
|
ClearBackground(RAYWHITE);
|
|
|
|
BeginMode3D(camera);
|
|
DrawMesh(mesh, material, MatrixIdentity());
|
|
EndMode3D();
|
|
|
|
DrawFPS(10, 10);
|
|
|
|
DrawTexturePro(
|
|
lightmap.texture,
|
|
(Rectangle){ 0, 0, -MAP_SIZE, -MAP_SIZE },
|
|
(Rectangle){ (float)GetRenderWidth() - MAP_SIZE*8 - 10, 10, (float)MAP_SIZE*8, (float)MAP_SIZE*8 },
|
|
(Vector2){ 0.0, 0.0 },
|
|
0.0,
|
|
WHITE);
|
|
|
|
DrawText("lightmap", GetRenderWidth() - 66, 16 + MAP_SIZE*8, 10, GRAY);
|
|
DrawText("10x10 pixels", GetRenderWidth() - 76, 30 + MAP_SIZE*8, 10, GRAY);
|
|
|
|
EndDrawing();
|
|
//----------------------------------------------------------------------------------
|
|
}
|
|
|
|
// De-Initialization
|
|
//--------------------------------------------------------------------------------------
|
|
UnloadMesh(mesh); // Unload the mesh
|
|
UnloadShader(shader); // Unload shader
|
|
UnloadTexture(texture); // Unload texture
|
|
UnloadTexture(light); // Unload texture
|
|
|
|
CloseWindow(); // Close window and OpenGL context
|
|
//--------------------------------------------------------------------------------------
|
|
|
|
return 0;
|
|
}
|