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REVIEWED: models_skybox #1792 #1778

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Ray 2021-05-26 20:21:37 +02:00
parent 05aff1e097
commit 1c7c8c682c
1 changed files with 28 additions and 12 deletions
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40
examples/models/models_skybox.c
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@ -37,7 +37,7 @@ int main(void)
Mesh cube = GenMeshCube(1.0f, 1.0f, 1.0f);
Model skybox = LoadModelFromMesh(cube);
bool useHDR = false;
bool useHDR = true;
// Load skybox shader and set required locations
// NOTE: Some locations are automatically set at shader loading
@ -56,12 +56,14 @@ int main(void)
char skyboxFileName[256] = { 0 };
Texture2D panorama;
if (useHDR)
{
TextCopy(skyboxFileName, "resources/dresden_square_2k.hdr");
// Load HDR panorama (sphere) texture
Texture2D panorama = panorama = LoadTexture(skyboxFileName);
panorama = LoadTexture(skyboxFileName);
// Generate cubemap (texture with 6 quads-cube-mapping) from panorama HDR texture
// NOTE 1: New texture is generated rendering to texture, shader calculates the sphere->cube coordinates mapping
@ -69,7 +71,7 @@ int main(void)
// despite texture can be successfully created.. so using PIXELFORMAT_UNCOMPRESSED_R8G8B8A8 instead of PIXELFORMAT_UNCOMPRESSED_R32G32B32A32
skybox.materials[0].maps[MATERIAL_MAP_CUBEMAP].texture = GenTextureCubemap(shdrCubemap, panorama, 1024, PIXELFORMAT_UNCOMPRESSED_R8G8B8A8);
UnloadTexture(panorama); // Texture not required anymore, cubemap already generated
//UnloadTexture(panorama); // Texture not required anymore, cubemap already generated
}
else
{
@ -144,10 +146,10 @@ int main(void)
EndMode3D();
if (useHDR)
DrawText(TextFormat("Panorama image from hdrihaven.com: %s", GetFileName(skyboxFileName)), 10, GetScreenHeight() - 20, 10, BLACK);
else
DrawText(TextFormat(": %s", GetFileName(skyboxFileName)), 10, GetScreenHeight() - 20, 10, BLACK);
//DrawTextureEx(panorama, (Vector2){ 0, 0 }, 0.0f, 0.5f, WHITE);
if (useHDR) DrawText(TextFormat("Panorama image from hdrihaven.com: %s", GetFileName(skyboxFileName)), 10, GetScreenHeight() - 20, 10, BLACK);
else DrawText(TextFormat(": %s", GetFileName(skyboxFileName)), 10, GetScreenHeight() - 20, 10, BLACK);
DrawFPS(10, 10);
@ -209,17 +211,31 @@ static TextureCubemap GenTextureCubemap(Shader shader, Texture2D panorama, int s
rlViewport(0, 0, size, size); // Set viewport to current fbo dimensions
// Activate and enable texture for drawing to cubemap faces
rlActiveTextureSlot(0);
rlEnableTexture(panorama.id);
for (int i = 0; i < 6; i++)
{
// Set the view matrix for the current cube face
rlSetUniformMatrix(shader.locs[SHADER_LOC_MATRIX_VIEW], fboViews[i]);
// Select the current cubemap face attachment for the fbo
// WARNING: This function by default enables->attach->disables fbo!!!
rlFramebufferAttach(fbo, cubemap.id, RL_ATTACHMENT_COLOR_CHANNEL0, RL_ATTACHMENT_CUBEMAP_POSITIVE_X + i, 0);
rlEnableFramebuffer(fbo);
rlSetTexture(panorama.id); // WARNING: It must be called after enabling current framebuffer if using internal batch system!
// Load and draw a cube, it uses the current enabled texture
rlClearScreenBuffers();
DrawCubeV(Vector3Zero(), Vector3One(), WHITE);
rlDrawRenderBatchActive();
rlLoadDrawCube();
// ALTERNATIVE: Try to use internal batch system to draw the cube instead of rlLoadDrawCube
// for some reason this method does not work, maybe due to cube triangles definition? normals pointing out?
// TODO: Investigate this issue...
//rlSetTexture(panorama.id); // WARNING: It must be called after enabling current framebuffer if using internal batch system!
//rlClearScreenBuffers();
//DrawCubeV(Vector3Zero(), Vector3One(), WHITE);
//rlDrawRenderBatchActive();
}
//------------------------------------------------------------------------------------------
@ -238,7 +254,7 @@ static TextureCubemap GenTextureCubemap(Shader shader, Texture2D panorama, int s
cubemap.width = size;
cubemap.height = size;
cubemap.mipmaps = 1;
cubemap.format = PIXELFORMAT_UNCOMPRESSED_R32G32B32;
cubemap.format = format;
return cubemap;
}