Method DrawTestPattern

engine/PoseidonGL33/EngineGL33_Lifecycle.cpp:226–433

}

void EngineGL33::DrawTestPattern(const char* name)
{
    if (!_glContext || !_frameOpen)
        return;

    auto makeTL = [](float x, float y, float z, DWORD col) -> TLVertex
    {
        TLVertex v;
        v.pos = Vector3P(x, y, z);
        v.rhw = 1.0f;
        v.color = PackedColor(col);
        v.specular = PackedColor(DWORD(0xFF000000));
        v.t0 = {0.0f, 0.0f};
        v.t1 = {0.0f, 0.0f};
        return v;
    };

    auto setupFlatDraw = [&]()
    {
        SelectVertexShader(VSScreen);
        UploadVSScreenConstants();
        SelectPixelShader(PSFlat);
        Poseidon::render::cull::None();
    };

    auto drawQuad = [&](TLVertex v[4])
    {
        TLVertex triList[6] = {v[0], v[1], v[2], v[0], v[2], v[3]};
        GL33Bind::Vao(_vaoScreen);
        glBindBuffer(GL_ARRAY_BUFFER, _vbo);
        glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(triList), triList);
        glDrawArrays(GL_TRIANGLES, 0, 6);
    };

    auto clearGL = [&](DWORD color)
    {
        float c[4] = {((color >> 16) & 0xFF) / 255.0f, ((color >> 8) & 0xFF) / 255.0f, (color & 0xFF) / 255.0f,
                      ((color >> 24) & 0xFF) / 255.0f};
        Poseidon::render::pipeline::SetClearColor(c[0], c[1], c[2], c[3]);
        Poseidon::render::clear::ColorDepthStencil();
    };

    if (strcmp(name, "gradient3d") == 0)
    {
        setupFlatDraw();
        InvalidatePipelineCache();
        ApplyBlendMode(BlendMode::Opaque);
        ApplyDepthMode(DepthMode::Normal);

        float w = (float)_w, h = (float)_h;
        TLVertex v[4] = {
            makeTL(0, 0, 0.5f, 0xFFFF0000),
            makeTL(w, 0, 0.5f, 0xFF00FF00),
            makeTL(w, h, 0.5f, 0xFFFFFFFF),
            makeTL(0, h, 0.5f, 0xFF0000FF),
        };
        drawQuad(v);
        return;