[置顶] ios 全景浏览效果demo

demo功能：全景浏览 效果，可上下左右前后转动浏览。

demo说明：项目中pano.jpg 是贴图 。将这个图贴到球型模型上，摄像机设定为球的中心点，在内向球外观看贴图。

demo截屏：

demo主要代码：plview.m部分（显示全景的view）

 

#import "PLView.h"

@interface PLView ()

- (void)initializeValues;

@end

@implementation PLView

@synthesize type;
@synthesize camera;

#pragma mark -
#pragma mark init methods

- (void)allocAndInitVariables
{
	[super allocAndInitVariables];
	scene = [PLScene scene];
	renderer = [PLRenderer rendererWithView:self scene:[scene retain]];
	camera = [PLCamera camera];
}

- (void)initializeValues
{
	[super initializeValues];
	textures = [[NSMutableArray array] retain];
	type = PLViewTypeUnknown;
}

- (void)reset
{
	if(camera)
		[camera reset];
	[super reset];
}

#pragma mark -
#pragma mark property methods

- (void)setType:(PLViewType)value
{
	type = value;
	if(sceneElement)
		[sceneElement release];
	
	switch (value) {
		case PLViewTypeCylindrical:
			camera.fovFactorRange = PLRangeMake(kDefaultCylinderFovFactorMinValue, kDefaultCylinderFovFactorMaxValue);
			sceneElement = [PLCylinder cylinder];
			break;
		case PLViewTypeSpherical:
			camera.fovFactorRange = PLRangeMake(kDefaultFovFactorMinValue, kDefaultFovFactorMaxValue);
			sceneElement = [PLSphere sphere];
			break;
		case PLViewTypeCubeFaces:
			camera.fovFactorRange = PLRangeMake(kDefaultFovFactorMinValue, kDefaultFovFactorMaxValue);
			sceneElement = [PLCube cube];
			break;
		case PLViewTypeUnknown:
			sceneElement = nil;
			break;
		default:
			[NSException raise:@"Invalid panorama type" format:@"Type unknown", nil];
			break;
	}
	
	if(sceneElement)
	{
		sceneElement = [sceneElement retain];
		for(PLTexture * texture in textures)
			[sceneElement addTexture:texture];
		[scene addElement:sceneElement];
	}
}

#pragma mark -
#pragma mark draw methods

- (void)drawView 
{    
	[super drawView];

	[sceneElement clonePropertiesOf:camera];
	[scene.currentCamera cloneCameraProperties:camera];
	scene.currentCamera.rotation = PLRotationMake(0.0f, 0.0f, 0.0f);
	scene.currentCamera.position = PLPositionMake(0.0f, 0.0f, 0.0f);
	
	if(!isValidForFov && !isValidForOrientation)
		[sceneElement rotateWithStartPoint:startPoint endPoint:endPoint sensitivity:camera.rotateSensitivity];
	[renderer render];

	camera.rotation = PLRotationMake(sceneElement.pitch, sceneElement.yaw, sceneElement.roll);	
}

#pragma mark -
#pragma mark fov methods

- (BOOL)calculateFov:(NSSet *)touches
{
	if([super calculateFov:touches])
	{
		[camera addFovWithDistance:fovDistance];
		[scene.currentCamera addFovWithDistance:fovDistance];
		return YES;
	}
	return NO;
}

#pragma mark -
#pragma mark texture methods

- (void)addTexture:(PLTexture *)texture
{
	[textures addObject:texture];
	if(sceneElement)
		[sceneElement addTexture:texture];
}
				
- (void)removeTexture:(PLTexture *)texture
{
	[textures removeObject:texture];
	if(sceneElement)
		[sceneElement removeTexture:texture];
}
				
- (void)removeTextureAtIndex:(NSUInteger) index
{
	[textures removeObjectAtIndex:index];
	if(sceneElement)
		[sceneElement removeTextureAtIndex:index];
}
				
- (void)removeAllTextures
{
	[textures removeAllObjects];
	if(sceneElement)
		[sceneElement removeAllTextures];
}

#pragma mark -
#pragma mark orientation methods

- (void)orientationChanged:(UIDeviceOrientation)orientation
{
	if(camera && sceneElement)
	{
		camera.orientation = orientation;
		sceneElement.orientation = orientation;
		camera.pitchRange = sceneElement.pitchRange;
		camera.yawRange = sceneElement.yawRange;
		camera.rollRange = sceneElement.rollRange;
		camera.rotation = PLRotationMake(sceneElement.pitch, sceneElement.yaw, sceneElement.roll);
	}
}

#pragma mark -
#pragma mark dealloc methods

- (void)dealloc 
{    
	if(textures)
		[textures release];
	if(camera)
		[camera release];
	if(sceneElement)
		[sceneElement release];
	if(scene)
		[scene release];
    if(renderer)
		[renderer release];
	[super dealloc];
}
				
@end

demo下载地址：http://download.csdn.net/detail/donny_zhang/5552467