C++ Sampler::setFilterMode方法代码示例

void LightSample::setUnlitMaterialTexture(Model* model, const char* texturePath, bool mipmap)
{
    Material* material = model->setMaterial("res/shaders/textured.vert", "res/shaders/textured.frag", "DIRECTIONAL_LIGHT_COUNT 1");
    material->setParameterAutoBinding("u_worldViewProjectionMatrix", "WORLD_VIEW_PROJECTION_MATRIX");

    // Load the texture from file.
    Texture::Sampler* sampler = material->getParameter("u_diffuseTexture")->setValue(texturePath, mipmap);
    if (mipmap)
	{
        sampler->setFilterMode(Texture::LINEAR_MIPMAP_LINEAR, Texture::LINEAR);
	}
	else
	{
        sampler->setFilterMode(Texture::LINEAR, Texture::LINEAR);
	}
	sampler->setWrapMode(Texture::CLAMP, Texture::CLAMP);
    material->getStateBlock()->setCullFace(true);
    material->getStateBlock()->setDepthTest(true);
    material->getStateBlock()->setDepthWrite(true);
	material->getStateBlock()->setBlend(true);
	material->getStateBlock()->setBlendSrc(RenderState::BLEND_SRC_ALPHA);
	material->getStateBlock()->setBlendDst(RenderState::BLEND_ONE_MINUS_SRC_ALPHA);
}

int lua_TextureSampler_setFilterMode(lua_State* state)
{
    // Get the number of parameters.
    int paramCount = lua_gettop(state);

    // Attempt to match the parameters to a valid binding.
    switch (paramCount)
    {
        case 3:
        {
            if ((lua_type(state, 1) == LUA_TUSERDATA) &&
                (lua_type(state, 2) == LUA_TSTRING || lua_type(state, 2) == LUA_TNIL) &&
                (lua_type(state, 3) == LUA_TSTRING || lua_type(state, 3) == LUA_TNIL))
            {
                // Get parameter 1 off the stack.
                Texture::Filter param1 = (Texture::Filter)lua_enumFromString_TextureFilter(luaL_checkstring(state, 2));

                // Get parameter 2 off the stack.
                Texture::Filter param2 = (Texture::Filter)lua_enumFromString_TextureFilter(luaL_checkstring(state, 3));

                Texture::Sampler* instance = getInstance(state);
                instance->setFilterMode(param1, param2);
                
                return 0;
            }
            else
            {
                lua_pushstring(state, "lua_TextureSampler_setFilterMode - Failed to match the given parameters to a valid function signature.");
                lua_error(state);
            }
            break;
        }
        default:
        {
            lua_pushstring(state, "Invalid number of parameters (expected 3).");
            lua_error(state);
            break;
        }
    }
    return 0;
}

void BillboardSample::loadGround()
{
	// Just a basic plane for this sample
	Mesh* mesh = Mesh::createQuad(-(GROUND_WIDTH / 2.0f), -(GROUND_HEIGHT / 2.0f), GROUND_WIDTH, GROUND_HEIGHT);
	Node* node = Node::create();
	_ground = Model::create(mesh);
	SAFE_RELEASE(mesh);
	node->setDrawable(_ground);
    _scene->addNode(node);
	node->rotateX(MATH_DEG_TO_RAD(90));
	Effect* effect = Effect::createFromFile("res/shaders/textured.vert", "res/shaders/textured.frag", "TEXTURE_REPEAT");    
	Material* material = Material::create(effect); 
	material->getStateBlock()->setDepthTest(true);
	material->getStateBlock()->setBlend(false);
	Texture::Sampler* sampler = material->getParameter("u_diffuseTexture")->setValue("res/png/dirt.png", true);
	sampler->setFilterMode(Texture::LINEAR_MIPMAP_LINEAR, Texture::LINEAR);
	material->getParameter("u_textureRepeat")->setValue(Vector2(GROUND_REPEAT_TEXTURE, GROUND_REPEAT_TEXTURE));
	material->setParameterAutoBinding("u_worldViewProjectionMatrix", RenderState::WORLD_VIEW_PROJECTION_MATRIX);
	_ground->setMaterial(material);
	SAFE_RELEASE(material);
	SAFE_RELEASE(effect)
    SAFE_RELEASE(node);
}

void CreateSceneSample::initialize()
{
    // Create the font for drawing the framerate.
    _font = Font::create("res/ui/arial.gpb");

    // Create a new empty scene.
    _scene = Scene::create();

    // Create the camera.
    Camera* camera = Camera::createPerspective(45.0f, getAspectRatio(), 1.0f, 10.0f);
    Node* cameraNode = _scene->addNode("camera");

    // Attach the camera to a node. This determines the position of the camera.
    cameraNode->setCamera(camera);

    // Make this the active camera of the scene.
    _scene->setActiveCamera(camera);
    SAFE_RELEASE(camera);

    // Move the camera to look at the origin.
    cameraNode->translate(0, 1, 5);
    cameraNode->rotateX(MATH_DEG_TO_RAD(-11.25f));

    // Create a white light.
    Light* light = Light::createDirectional(0.75f, 0.75f, 0.75f);
    Node* lightNode = _scene->addNode("light");
    lightNode->setLight(light);
    // Release the light because the node now holds a reference to it.
    SAFE_RELEASE(light);
    lightNode->rotateX(MATH_DEG_TO_RAD(-45.0f));

    // Create the cube mesh and model.
    Mesh* cubeMesh = createCubeMesh();
    Model* cubeModel = Model::create(cubeMesh);
    // Release the mesh because the model now holds a reference to it.
    SAFE_RELEASE(cubeMesh);

    // Create the material for the cube model and assign it to the first mesh part.
    Material* material = cubeModel->setMaterial("res/shaders/textured.vert", "res/shaders/textured.frag", "DIRECTIONAL_LIGHT_COUNT 1");

    // These parameters are normally set in a .material file but this example sets them programmatically.
    // Bind the uniform "u_worldViewProjectionMatrix" to use the WORLD_VIEW_PROJECTION_MATRIX from the scene's active camera and the node that the model belongs to.
    material->setParameterAutoBinding("u_worldViewProjectionMatrix", "WORLD_VIEW_PROJECTION_MATRIX");
    material->setParameterAutoBinding("u_inverseTransposeWorldViewMatrix", "INVERSE_TRANSPOSE_WORLD_VIEW_MATRIX");
    // Set the ambient color of the material.
    material->getParameter("u_ambientColor")->setValue(Vector3(0.2f, 0.2f, 0.2f));

    // Bind the light's color and direction to the material.
    material->getParameter("u_directionalLightColor[0]")->setValue(lightNode->getLight()->getColor());
    material->getParameter("u_directionalLightDirection[0]")->bindValue(lightNode, &Node::getForwardVectorWorld);

    // Load the texture from file.
    Texture::Sampler* sampler = material->getParameter("u_diffuseTexture")->setValue("res/png/crate.png", true);
    sampler->setFilterMode(Texture::LINEAR_MIPMAP_LINEAR, Texture::LINEAR);
    material->getStateBlock()->setCullFace(true);
    material->getStateBlock()->setDepthTest(true);
    material->getStateBlock()->setDepthWrite(true);

    _cubeNode = _scene->addNode("cube");
    _cubeNode->setModel(cubeModel);
    _cubeNode->rotateY(MATH_PIOVER4);
    SAFE_RELEASE(cubeModel);
}

//.........这里部分代码省略.........
            GP_ASSERT(renderState->getParameter(name));
            renderState->getParameter(name)->setValue(properties->getFloat());
            break;
        case Properties::VECTOR2:
            {
                Vector2 vector2;
                if (properties->getVector2(NULL, &vector2))
                {
                    GP_ASSERT(renderState->getParameter(name));
                    renderState->getParameter(name)->setValue(vector2);
                }
            }
            break;
        case Properties::VECTOR3:
            {
                Vector3 vector3;
                if (properties->getVector3(NULL, &vector3))
                {
                    GP_ASSERT(renderState->getParameter(name));
                    renderState->getParameter(name)->setValue(vector3);
                }
            }
            break;
        case Properties::VECTOR4:
            {
                Vector4 vector4;
                if (properties->getVector4(NULL, &vector4))
                {
                    GP_ASSERT(renderState->getParameter(name));
                    renderState->getParameter(name)->setValue(vector4);
                }
            }
            break;
        case Properties::MATRIX:
            {
                Matrix matrix;
                if (properties->getMatrix(NULL, &matrix))
                {
                    GP_ASSERT(renderState->getParameter(name));
                    renderState->getParameter(name)->setValue(matrix);
                }
            }
            break;
        default:
            {
                // Assume this is a parameter auto-binding.
                renderState->setParameterAutoBinding(name, properties->getString());
            }
            break;
        }
    }

    // Iterate through all child namespaces searching for samplers and render state blocks.
    Properties* ns;
    while ((ns = properties->getNextNamespace()))
    {
        if (strcmp(ns->getNamespace(), "sampler") == 0)
        {
            // Read the texture uniform name.
            name = ns->getId();
            if (strlen(name) == 0)
            {
                GP_ERROR("Texture sampler is missing required uniform name.");
                continue;
            }

            // Get the texture path.
            const char* path = ns->getString("path");
            if (path == NULL || strlen(path) == 0)
            {
                GP_ERROR("Texture sampler '%s' is missing required image file path.", name);
                continue;
            }

            // Read texture state (booleans default to 'false' if not present).
            bool mipmap = ns->getBool("mipmap");
            Texture::Wrap wrapS = parseTextureWrapMode(ns->getString("wrapS"), Texture::REPEAT);
            Texture::Wrap wrapT = parseTextureWrapMode(ns->getString("wrapT"), Texture::REPEAT);
            Texture::Filter minFilter = parseTextureFilterMode(ns->getString("minFilter"), mipmap ? Texture::NEAREST_MIPMAP_LINEAR : Texture::LINEAR);
            Texture::Filter magFilter = parseTextureFilterMode(ns->getString("magFilter"), Texture::LINEAR);

            // Set the sampler parameter.
            GP_ASSERT(renderState->getParameter(name));
            Texture::Sampler* sampler = renderState->getParameter(name)->setValue(path, mipmap);
            if (sampler)
            {
                sampler->setWrapMode(wrapS, wrapT);
                sampler->setFilterMode(minFilter, magFilter);
            }
        }
        else if (strcmp(ns->getNamespace(), "renderState") == 0)
        {
            while ((name = ns->getNextProperty()))
            {
                GP_ASSERT(renderState->getStateBlock());
                renderState->getStateBlock()->setState(name, ns->getString());
            }
        }
    }
}