Shadow Problems

[SpiderPig]

Okay, it's because it's far away from the origin.  This test grid is 2048 vertically up, move around and you can see the dark shapes move with the camera.  I wouldn't have thought this was far enough for floating point problems, but it may be related?

#include "UltraEngine.h"

using namespace UltraEngine;

Vec3 mousepos = Vec3(0.0f);
float move_adjustment = 0.1f;
float move_speed = 1.0f;
float lookspeed = 0.1f;
float looksmoothing = 0.5f;

int main(int argc, const char* argv[])
{
    auto displays = GetDisplays();
    auto window = CreateWindow("Ultra Engine", 0, 0, 1280, 720, displays[0], WINDOW_CENTER | WINDOW_TITLEBAR);
    auto world = CreateWorld();
    auto framebuffer = CreateFramebuffer(window);

    auto camera = CreateCamera(world);
    camera->SetClearColor(0.125);
    camera->SetFov(70);
    camera->SetPosition(0, 0, -3);

    auto light = CreateDirectionalLight(world);
    light->SetRotation(35, 35, 0);

    auto box = CreateBox(world);
    box->SetPosition(10.0f, 2049.0f, 10.0f);

    auto custom_model = CreateModel(world);
    auto mesh = custom_model->AddMesh();

    int size = 256, index = 0;
    for (int z = 0; z < size; z++) {
        for (int x = 0; x < size; x++) {
            mesh->AddVertex(x, 0.0f, z, 0.0f, 1.0f, 0.0f);

            if (x != 0 && x != size - 1 && z != 0 && z != size - 1) {
                mesh->AddPrimitive(index, index - size - 1, index - 1);
                mesh->AddPrimitive(index, index - size, index - size - 1);
            }
            index++;
        }
    }

    custom_model->UpdateBounds();
    custom_model->SetPosition(0.0f, 2048.0f, 0.0f);
    camera->SetPosition(0.0f, 2048.0f, 0.0f);


    while (window->Closed() == false and window->KeyDown(KEY_ESCAPE) == false)
    {
        if (window->KeyHit(KEY_F2) == true) { camera->SetWireframe(!camera->GetWireframe()); }

        auto _displaySize = window->GetSize();
        float cx = Round((float)_displaySize.x / 2.0f);
        float cy = Round((float)_displaySize.y / 2.0f);

        auto mpos = Vec3(window->GetMousePosition().x, window->GetMousePosition().y, window->GetMousePosition().z);
        window->SetMousePosition(cx, cy);
        mpos = mpos * looksmoothing + mousepos * (1 - looksmoothing);
        auto dx = (mpos.x - cx) * lookspeed;
        auto dy = (mpos.y - cy) * lookspeed;


        auto camrot = camera->GetRotation();
        camrot.x += dy;
        camrot.y += dx;
        camera->SetRotation(camrot);
        mousepos = mpos;

        auto speed = 0.1f;
        if (window->KeyDown(KEY_SHIFT) == true) { speed = speed * 10.0f; }
        if (window->KeyDown(KEY_W) == true) {camera->Move(0, 0, speed);}
        else if (window->KeyDown(KEY_S) == true) { camera->Move(0, 0, -speed); }
        if (window->KeyDown(KEY_A) == true) { camera->Move(-speed, 0, 0); }
        else if (window->KeyDown(KEY_D) == true) { camera->Move(speed, 0, 0); }

        world->Update();
        world->Render(framebuffer);
    }
    return 0;
}

 

[SpiderPig]

Might be related to the problem.  I've never seen the shadow polygons get that high.

[Josh]

Here is my modified version. At around height 361, it looks like the box is intersecting the light's near clipping plane...

#include "UltraEngine.h"

using namespace UltraEngine;

Vec3 mousepos = Vec3(0.0f);
float move_adjustment = 0.1f;
float move_speed = 1.0f;
float lookspeed = 0.1f;
float looksmoothing = 0.5f;

int main(int argc, const char* argv[])
{
    const float dist = 100;

    auto displays = GetDisplays();
    auto window = CreateWindow("Ultra Engine", 0, 0, 1280, 720, displays[0], WINDOW_CENTER | WINDOW_TITLEBAR);
    auto world = CreateWorld();
    auto framebuffer = CreateFramebuffer(window);

    auto camera = CreateCamera(world);
    camera->SetClearColor(0,0,1,1);
    camera->SetFov(70);
    camera->SetPosition(3, 2, 0);
    camera->SetRotation(45, 90, 0);

    auto light = CreateDirectionalLight(world);
    light->SetRotation(35, 35, 0);

    auto box = CreateBox(world);
    box->SetPosition(10.0f, dist + 1.0f, 10.0f);

    auto custom_model = CreateModel(world);
    auto mesh = custom_model->AddMesh();

    int size = 256, index = 0;
    for (int z = 0; z < size; z++) {
        for (int x = 0; x < size; x++) {
            mesh->AddVertex(x, 0.0f, z, 0.0f, 1.0f, 0.0f);
            if (x != 0 && x != size - 1 && z != 0 && z != size - 1) {
                mesh->AddPrimitive(index, index - size - 1, index - 1);
                mesh->AddPrimitive(index, index - size, index - size - 1);
            }
            index++;
        }
    }

    custom_model->UpdateBounds();
    custom_model->SetPosition(0.0f, dist, 0.0f);
    camera->SetPosition(0.0f, dist + 1.0f, 0.0f);

    while (window->Closed() == false and window->KeyDown(KEY_ESCAPE) == false)
    {
        window->SetText(box->position.y);

        if (window->KeyDown(KEY_UP))
        {
            box->Translate(0, 1, 0);
            custom_model->Translate(0, 1, 0);
            camera->Translate(0, 1, 0);
        }
        if (window->KeyDown(KEY_DOWN))
        {
            box->Translate(0, -1, 0);
            custom_model->Translate(0, -1, 0);
            camera->Translate(0, -1, 0);
        }

        if (window->KeyHit(KEY_F2) == true) { camera->SetWireframe(!camera->GetWireframe()); }

        auto _displaySize = window->GetSize();
        float cx = Round((float)_displaySize.x / 2.0f);
        float cy = Round((float)_displaySize.y / 2.0f);

        auto mpos = Vec3(window->GetMousePosition().x, window->GetMousePosition().y, window->GetMousePosition().z);
        window->SetMousePosition(cx, cy);
        mpos = mpos * looksmoothing + mousepos * (1 - looksmoothing);
        auto dx = (mpos.x - cx) * lookspeed;
        auto dy = (mpos.y - cy) * lookspeed;


        auto camrot = camera->GetRotation();
        camrot.x += dy;
        camrot.y += dx;
        camera->SetRotation(camrot);
        mousepos = mpos;

        auto speed = 0.1f;
        if (window->KeyDown(KEY_SHIFT) == true) { speed = speed * 10.0f; }
        if (window->KeyDown(KEY_W) == true) { camera->Move(0, 0, speed); }
        else if (window->KeyDown(KEY_S) == true) { camera->Move(0, 0, -speed); }
        if (window->KeyDown(KEY_A) == true) { camera->Move(-speed, 0, 0); }
        else if (window->KeyDown(KEY_D) == true) { camera->Move(speed, 0, 0); }

        world->Update();
        world->Render(framebuffer);
    }
    return 0;
}

[Josh]

At 1036 I think the whole scene intersects the far clipping plane...

[Josh]

This example will work as expected in the next build.