Blender を使用して 3D 牛を作成し、正しい頂点を取得しています (後で重複を削除するために最適化されています)。この牛の複数のインスタンスを画面に描画できるように、Cow クラスを作成しました。
牛 1 は(-2,0,-10)に描画され、牛 2 は(2,0,-10) に描画されます。牛 1 のみをレンダリングすると、牛 1 が(-2,0,-10)に表示されます。両方の牛または牛 2 のみをレンダリングすると (comment render cow 1 out)、(2,0,-10)で牛 2 (牛 1 は表示されません) のみが得られます。多くの敵が走り回るゲームを作成しています。これらのオブジェクトの複数のインスタンスを描画し、さまざまな場所で個別にレンダリングできる必要があります。誰が私が間違っているのか教えてもらえますか? ありがとう
//
// Cow.m
//
#import "Cow.h"
#import "cow_verts.h"
@implementation Cow
- (id)initWithContext:(EAGLContext *)aContext {
context = aContext;
effect = [[GLKBaseEffect alloc] init];
[EAGLContext setCurrentContext:context];
sharedResourceManager = [ResourceManager sharedResourceManager];
UIImage *textureImage = [UIImage imageNamed:@"cowUV.png"];
texture = [sharedResourceManager addTexture:textureImage];
position = GLKVector3Make(0,0,0);
rotation = GLKVector3Make(0,0,0);
scale = GLKVector3Make(1,1,1);
[self setupGL];
return self;
}
- (void)setupGL {
glGenVertexArraysOES(1, &_vao);
glBindVertexArrayOES(_vao);
glGenBuffers(1, &_dynamicVBO);
glBindBuffer(GL_ARRAY_BUFFER, _dynamicVBO);
glBufferData(GL_ARRAY_BUFFER, sizeof(CowDynamicVertexData), CowDynamicVertexData, GL_DYNAMIC_DRAW);
glVertexAttribPointer(GLKVertexAttribPosition, 3, GL_FLOAT, GL_FALSE, sizeof(dynamicVertexData), (void *)offsetof(dynamicVertexData, position));
glEnableVertexAttribArray(GLKVertexAttribPosition);
glGenBuffers(1, &_staticVBO);
glBindBuffer(GL_ARRAY_BUFFER, _staticVBO);
glBufferData(GL_ARRAY_BUFFER, sizeof(CowStaticVertexData), CowStaticVertexData, GL_STATIC_DRAW);
glVertexAttribPointer(GLKVertexAttribTexCoord0, 2, GL_FLOAT, GL_FALSE, sizeof(staticVertexData), (void *)offsetof(staticVertexData, texCoord));
glEnableVertexAttribArray(GLKVertexAttribTexCoord0);
glGenBuffers(1, &_indexBuffer);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, _indexBuffer);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(CowIndices), CowIndices, GL_STATIC_DRAW);
glBindVertexArrayOES(0);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
glBindBuffer(GL_ARRAY_BUFFER, 0);
}
- (void)updateWithDelta:(float)aDelta {
float aspect = fabsf([[UIScreen mainScreen] bounds].size.width/ [[UIScreen mainScreen] bounds].size.height);
GLKMatrix4 projectionMatrix = GLKMatrix4MakePerspective(GLKMathDegreesToRadians(65.0f), aspect, 4.0f, 20.0f);
effect.transform.projectionMatrix = projectionMatrix;
rotation.y += 90 * aDelta;
}
- (void)render {
[EAGLContext setCurrentContext:context];
glClearColor(0, 1, 1, 1);
glClear( GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
GLKMatrix4 xRotationMatrix = GLKMatrix4MakeXRotation(GLKMathDegreesToRadians(rotation.x));
GLKMatrix4 yRotationMatrix = GLKMatrix4MakeYRotation(GLKMathDegreesToRadians(rotation.y));
GLKMatrix4 zRotationMatrix = GLKMatrix4MakeZRotation(GLKMathDegreesToRadians(rotation.z));
GLKMatrix4 scaleMatrix = GLKMatrix4MakeScale(scale.x, scale.y, scale.z);
GLKMatrix4 translateMatrix = GLKMatrix4MakeTranslation(position.x, position.y, position.z);
GLKMatrix4 modelMatrix = GLKMatrix4Multiply(translateMatrix,
GLKMatrix4Multiply(scaleMatrix,
GLKMatrix4Multiply(zRotationMatrix,
GLKMatrix4Multiply(yRotationMatrix,
xRotationMatrix))));
effect.transform.modelviewMatrix = modelMatrix;
//GLKMatrix4 viewMatrix = GLKMatrix4MakeLookAt(0, 0, 3, 0, 0, 0, 0, 1, 0);
//effect.transform.modelviewMatrix = GLKMatrix4Multiply(viewMatrix, modelMatrix);
effect.texture2d0.name = texture.name;
effect.texture2d0.target = texture.target;
effect.texture2d0.envMode = GLKTextureEnvModeReplace;
glEnable(GL_DEPTH_TEST);
glEnable(GL_CULL_FACE);
glCullFace(GL_FRONT);
glBindVertexArrayOES(_vao);
[effect prepareToDraw];
glDrawElements(GL_TRIANGLES, sizeof(CowIndices)/sizeof(CowIndices[0]), GL_UNSIGNED_INT, (void *)0);
glBindVertexArrayOES(0);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
glDisable(GL_DEPTH_TEST);
glDisable(GL_CULL_FACE);
}
@end
//
// Cow.h
//
@interface Cow : NSObject {
EAGLContext *context;
GLuint _vao;
GLuint _staticVBO;
GLuint _dynamicVBO;
GLuint _indexBuffer;
GLKTextureInfo *texture;
GLKBaseEffect *effect;
GLKVector3 position;
GLKVector3 rotation;
GLKVector3 scale;
ResourceManager *sharedResourceManager;
}
- (id)initWithContext:(EAGLContext *)aContext;
- (void)updateWithDelta:(float)aDelta;
- (void)render;
@end
//
// Scene which creates these objects and calls the functions
//
#import "Cow.h"
@implementation GameScene {
NSMutableArray *cows;
}
- (id)init {
if(self = [super init]) {
sharedDirector = [Director sharedDirector];
[EAGLContext setCurrentContext:[sharedDirector context]];
cows = [[NSMutableArray alloc] init];
AbstractEnemy *cow1 = [[Cow alloc] initWithContext:[sharedDirector context]];
cow1.position = GLKVector3Make(-2, 0, -10);
[cows addObject:cow1];
AbstractEnemy *cow2 = [[Cow alloc] initWithContext:[sharedDirector context]];
cow2.position = GLKVector3Make(2, 0, -10);
[cows addObject:cow2];
AbstractEnemy *cow3 = [[Cow alloc] initWithContext:[sharedDirector context]];
cow3.position = GLKVector3Make(0, 0, -15);
[cows addObject:cow3];
}
return self;
}
- (void)updateWithDelta:(GLfloat)aDelta {
for (int i = 0; i < cows.count; i++)
{
[cows[i] updateWithDelta:aDelta];
}
}
- (void)render {
for (int i = 0; i < cows.count; i++)
{
[cows[i] render];
}
}
@end