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REVIEWED: Ligthmap example

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Ray 2023-05-04 20:35:20 +02:00
parent abcbd9817e
commit 5573f0f1c7
4 changed files with 81 additions and 72 deletions
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13
examples/shaders/resources/shaders/glsl330/lightmap.fs
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@ -1,4 +1,5 @@
#version 330 #version 330
// Input vertex attributes (from vertex shader) // Input vertex attributes (from vertex shader)
in vec2 fragTexCoord; in vec2 fragTexCoord;
in vec2 fragTexCoord2; in vec2 fragTexCoord2;
@ -12,9 +13,11 @@ uniform sampler2D texture1;
// Output fragment color // Output fragment color
out vec4 finalColor; out vec4 finalColor;
void main() { void main()
// Texel color fetching from texture sampler {
vec4 texelColor = texture( texture0, fragTexCoord ); // Texel color fetching from texture sampler
vec4 texelColor2 = texture( texture1, fragTexCoord2 ); vec4 texelColor = texture(texture0, fragTexCoord);
finalColor = texelColor * texelColor2; vec4 texelColor2 = texture(texture1, fragTexCoord2);
finalColor = texelColor * texelColor2;
} }

8
examples/shaders/resources/shaders/glsl330/lightmap.vs
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@ -1,4 +1,5 @@
#version 330 #version 330
// Input vertex attributes // Input vertex attributes
in vec3 vertexPosition; in vec3 vertexPosition;
in vec2 vertexTexCoord; in vec2 vertexTexCoord;
@ -15,13 +16,14 @@ out vec2 fragTexCoord;
out vec2 fragTexCoord2; out vec2 fragTexCoord2;
out vec4 fragColor; out vec4 fragColor;
void main() { void main()
{
// Send vertex attributes to fragment shader // Send vertex attributes to fragment shader
fragPosition = vec3( matModel * vec4( vertexPosition, 1.0 ) ); fragPosition = vec3(matModel*vec4(vertexPosition, 1.0));
fragTexCoord = vertexTexCoord; fragTexCoord = vertexTexCoord;
fragTexCoord2 = vertexTexCoord2; fragTexCoord2 = vertexTexCoord2;
fragColor = vertexColor; fragColor = vertexColor;
// Calculate final vertex position // Calculate final vertex position
gl_Position = mvp * vec4( vertexPosition, 1.0 ); gl_Position = mvp*vec4(vertexPosition, 1.0);
} }

132
examples/shaders/shaders_lightmap.c
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@ -46,81 +46,82 @@ int main(void)
// Define the camera to look into our 3d world // Define the camera to look into our 3d world
Camera camera = { 0 }; Camera camera = { 0 };
camera.position = (Vector3){ 2.0f, 4.0f, 6.0f }; // Camera position camera.position = (Vector3){ 4.0f, 6.0f, 8.0f }; // Camera position
camera.target = (Vector3){ 0.0f, 0.5f, 0.0f }; // Camera looking at point 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.up = (Vector3){ 0.0f, 1.0f, 0.0f }; // Camera up vector (rotation towards target)
camera.fovy = 45.0f; // Camera field-of-view Y camera.fovy = 45.0f; // Camera field-of-view Y
camera.projection = CAMERA_PERSPECTIVE; // Camera projection type camera.projection = CAMERA_PERSPECTIVE; // Camera projection type
Mesh mesh = GenMeshPlane((float)MAP_SIZE, (float)MAP_SIZE, 1, 1); Mesh mesh = GenMeshPlane((float)MAP_SIZE, (float)MAP_SIZE, 1, 1);
// GenMeshPlane doesn't generate texcoords2 so we will upload them separately // GenMeshPlane doesn't generate texcoords2 so we will upload them separately
mesh.texcoords2 = (float *)RL_MALLOC(mesh.vertexCount * 2 * sizeof(float)); mesh.texcoords2 = (float *)RL_MALLOC(mesh.vertexCount*2*sizeof(float));
// X // Y // X // Y
mesh.texcoords2[0] = 0.0f; mesh.texcoords2[1] = 0.0f; mesh.texcoords2[0] = 0.0f; mesh.texcoords2[1] = 0.0f;
mesh.texcoords2[2] = 1.0f; mesh.texcoords2[3] = 0.0f; mesh.texcoords2[2] = 1.0f; mesh.texcoords2[3] = 0.0f;
mesh.texcoords2[4] = 0.0f; mesh.texcoords2[5] = 1.0f; mesh.texcoords2[4] = 0.0f; mesh.texcoords2[5] = 1.0f;
mesh.texcoords2[6] = 1.0f; mesh.texcoords2[7] = 1.0f; mesh.texcoords2[6] = 1.0f; mesh.texcoords2[7] = 1.0f;
// Load a new texcoords2 attributes buffer // Load a new texcoords2 attributes buffer
mesh.vboId[SHADER_LOC_VERTEX_TEXCOORD02] = rlLoadVertexBuffer(mesh.texcoords2, mesh.vertexCount*2*sizeof(float), false); mesh.vboId[SHADER_LOC_VERTEX_TEXCOORD02] = rlLoadVertexBuffer(mesh.texcoords2, mesh.vertexCount*2*sizeof(float), false);
rlEnableVertexArray(mesh.vaoId); rlEnableVertexArray(mesh.vaoId);
// Index 5 is for texcoords2
rlSetVertexAttribute(5, 2, RL_FLOAT, 0, 0, 0); // Index 5 is for texcoords2
rlEnableVertexAttribute(5); rlSetVertexAttribute(5, 2, RL_FLOAT, 0, 0, 0);
rlDisableVertexArray(); rlEnableVertexAttribute(5);
rlDisableVertexArray();
// Load lightmap shader // Load lightmap shader
Shader shader = LoadShader(TextFormat("resources/shaders/glsl%i/lightmap.vs", GLSL_VERSION), Shader shader = LoadShader(TextFormat("resources/shaders/glsl%i/lightmap.vs", GLSL_VERSION),
TextFormat("resources/shaders/glsl%i/lightmap.fs", GLSL_VERSION)); TextFormat("resources/shaders/glsl%i/lightmap.fs", GLSL_VERSION));
Texture texture = LoadTexture("resources/cubicmap_atlas.png"); Texture texture = LoadTexture("resources/cubicmap_atlas.png");
Texture light = LoadTexture("resources/spark_flame.png"); Texture light = LoadTexture("resources/spark_flame.png");
GenTextureMipmaps(&texture); GenTextureMipmaps(&texture);
SetTextureFilter(texture, TEXTURE_FILTER_TRILINEAR); SetTextureFilter(texture, TEXTURE_FILTER_TRILINEAR);
RenderTexture lightmap = LoadRenderTexture(MAP_SIZE, MAP_SIZE); RenderTexture lightmap = LoadRenderTexture(MAP_SIZE, MAP_SIZE);
SetTextureFilter(lightmap.texture, TEXTURE_FILTER_TRILINEAR); SetTextureFilter(lightmap.texture, TEXTURE_FILTER_TRILINEAR);
Material material = LoadMaterialDefault(); Material material = LoadMaterialDefault();
material.shader = shader; material.shader = shader;
material.maps[MATERIAL_MAP_ALBEDO].texture = texture; material.maps[MATERIAL_MAP_ALBEDO].texture = texture;
material.maps[MATERIAL_MAP_METALNESS].texture = lightmap.texture; material.maps[MATERIAL_MAP_METALNESS].texture = lightmap.texture;
// Drawing to lightmap // Drawing to lightmap
BeginTextureMode(lightmap); BeginTextureMode(lightmap);
ClearBackground(BLACK); ClearBackground(BLACK);
BeginBlendMode(BLEND_ADDITIVE); BeginBlendMode(BLEND_ADDITIVE);
DrawTexturePro( DrawTexturePro(
light, light,
(Rectangle){ 0, 0, light.width, light.height }, (Rectangle){ 0, 0, light.width, light.height },
(Rectangle){ 0, 0, 20, 20 }, (Rectangle){ 0, 0, 20, 20 },
(Vector2){ 10.0, 10.0 }, (Vector2){ 10.0, 10.0 },
0.0, 0.0,
RED RED
); );
DrawTexturePro( DrawTexturePro(
light, light,
(Rectangle){ 0, 0, light.width, light.height }, (Rectangle){ 0, 0, light.width, light.height },
(Rectangle){ 8, 4, 20, 20 }, (Rectangle){ 8, 4, 20, 20 },
(Vector2){ 10.0, 10.0 }, (Vector2){ 10.0, 10.0 },
0.0, 0.0,
BLUE BLUE
); );
DrawTexturePro( DrawTexturePro(
light, light,
(Rectangle){ 0, 0, light.width, light.height }, (Rectangle){ 0, 0, light.width, light.height },
(Rectangle){ 8, 8, 10, 10 }, (Rectangle){ 8, 8, 10, 10 },
(Vector2){ 5.0, 5.0 }, (Vector2){ 5.0, 5.0 },
0.0, 0.0,
GREEN GREEN
); );
BeginBlendMode(BLEND_ALPHA); BeginBlendMode(BLEND_ALPHA);
EndTextureMode(); EndTextureMode();
SetTargetFPS(60); // Set our game to run at 60 frames-per-second SetTargetFPS(60); // Set our game to run at 60 frames-per-second
//-------------------------------------------------------------------------------------- //--------------------------------------------------------------------------------------
@ -139,26 +140,29 @@ int main(void)
ClearBackground(RAYWHITE); ClearBackground(RAYWHITE);
BeginMode3D(camera); BeginMode3D(camera);
DrawMesh(mesh, material, MatrixIdentity()); DrawMesh(mesh, material, MatrixIdentity());
EndMode3D(); EndMode3D();
DrawFPS(10, 10); DrawFPS(10, 10);
DrawTexturePro( DrawTexturePro(
lightmap.texture, lightmap.texture,
(Rectangle){ 0, 0, MAP_SIZE, MAP_SIZE }, (Rectangle){ 0, 0, -MAP_SIZE, -MAP_SIZE },
(Rectangle){ 0, 36, MAP_SIZE * 4, MAP_SIZE * 4 }, (Rectangle){ GetRenderWidth() - MAP_SIZE*8 - 10, 10, MAP_SIZE*8, MAP_SIZE*8 },
(Vector2){ 0.0, 0.0 }, (Vector2){ 0.0, 0.0 },
0.0, 0.0,
WHITE WHITE);
);
DrawText("lightmap", GetRenderWidth() - 66, 16 + MAP_SIZE*8, 10, GRAY);
DrawText("10x10 pixels", GetRenderWidth() - 76, 30 + MAP_SIZE*8, 10, GRAY);
EndDrawing(); EndDrawing();
//---------------------------------------------------------------------------------- //----------------------------------------------------------------------------------
} }
// De-Initialization // De-Initialization
//-------------------------------------------------------------------------------------- //--------------------------------------------------------------------------------------
UnloadMesh(mesh); // Unload the mesh UnloadMesh(mesh); // Unload the mesh
UnloadShader(shader); // Unload shader UnloadShader(shader); // Unload shader
CloseWindow(); // Close window and OpenGL context CloseWindow(); // Close window and OpenGL context

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examples/shaders/shaders_lightmap.png
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