Knalleridee

Knalleridee makes games. Casual, not ordinary .. of course. :)

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Using dragon bones in cocos2dx 3.10

The last couple of days I was trying to integrate dragon bones CPP into our upcoming game. It seemed to be easy. Just following instructions on github compiled correctly I thought. I had overseen some linking warnings that could have been a hint for all the trouble. Loading a json file at runtime failed. Json had been parsed with random types which crashed dragon bones parser. I recognised that dragon bones’ rapid json and cocos2dx rapid json are incompatible and some defines are different. 

How can you solve this? Just remove dragon bones rapid json and change include paths in JSONDataParser.h and alter the dragon bones_rapidjson define as follows:

#define dragonBones_rapidjson rapidjson

This might bring some compiler errors which can be corrected easily.

In JSONDataParser.cpp

Replace all GetFloat() methods to GetDouble()

Find all GetArray() calls and use iterators for loops

Replace genericValue.GetArray().size() with genericValue.size()

This worked for me. I should say that we are working on iOS. 

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Change texture of custom sprite

Just figured out that 

void Sprite::setTexture(const std::string &filename );

will clear PolygonInfo and all hard work setting up a custom mesh is gone.

Use 

 void Sprite::setTexture(Texture2D *texture);

instead and texture is the only thing changing.

To get a texture object use TextureManager:

auto texture = cocos2d::Director::getInstance()->getTextureCache()->addImage("cheese.png");

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Custom Sprite Mesh in cocos2d-x

Sometimes you need to set your own mesh with uv coordinates to get your sprite right. To achieve that you might use cocos2d::PolygonInfo. Here we share some sample code for you to get a start. We have a Sprite called sprite initiated already.

cocos2d::PolygonInfo inf;

// inf.filename = "nice_texture.png"; // how many vertices do wie have inf.triangles.vertCount = 4; // allocating memory for vertices (vertex position on the screen, vertex color Color4B, uv) inf.triangles.verts = new cocos2d::V3F_C4B_T2F[inf.triangles.vertCount]; // we draw 2 triangles so we need 2x3 = 6 indices inf.triangles.indexCount = 6; // allocate some memory for our indices inf.triangles.indices = new unsigned short[inf.triangles.indexCount]; //Create our uv coordinates cocos2d::Vec2 tc00 = cocos2d::Vec2(0,0); cocos2d::Vec2 tc10 = cocos2d::Vec2(1,0); cocos2d::Vec2 tc01 = cocos2d::Vec2(0,1); cocos2d::Vec2 tc11 = cocos2d::Vec2(1,1); inf.triangles.verts[0].vertices = cocos2d::Vec3(-1,-1,0); inf.triangles.verts[0].texCoords = cocos2d::Tex2F(tc00.x,tc00.y); inf.triangles.verts[0].colors = cocos2d::Color4B(255, 255, 255, 255); inf.triangles.verts[1].vertices = cocos2d::Vec3(1,-1,0) ; inf.triangles.verts[1].texCoords = cocos2d::Tex2F(tc10.x,tc10.y); inf.triangles.verts[1].colors = cocos2d::Color4B(255, 255, 255, 255); inf.triangles.verts[2].vertices = cocos2d::Vec3(-0.75,1,0); inf.triangles.verts[2].texCoords = cocos2d::Tex2F(tc01.x,tc01.y); inf.triangles.verts[2].colors =  cocos2d::Color4B(255, 255, 255, 255); inf.triangles.verts[3].vertices = cocos2d::Vec3(0.75,1,0) ; inf.triangles.verts[3].texCoords = cocos2d::Tex2F(tc11.x,tc11.y); inf.triangles.verts[3].colors =  cocos2d::Color4B(255, 255, 255, 255); // setting the indices  inf.triangles.indices[0] = 0; inf.triangles.indices[1] = 1; inf.triangles.indices[2] = 2; inf.triangles.indices[3] = 2; inf.triangles.indices[4] = 1; inf.triangles.indices[5] = 3; //calculating bounding box float min_x = HUGE_VALF, min_y = HUGE_VALF, max_x = -HUGE_VALF, max_y = -HUGE_VALF; for (int i = 0; i < 4; i++) { min_x = std::min(min_x, inf.triangles.verts[i].vertices.x); max_x = std::max(max_x, inf.triangles.verts[i].vertices.x); min_y = std::min(min_y, inf.triangles.verts[i].vertices.y); max_y = std::max(max_y, inf.triangles.verts[i].vertices.y); } //setting bounding box inf.rect = cocos2d::Rect(cocos2d::Vec2(min_x, min_y), cocos2d::Size(max_x-min_x,max_y-min_y)); sprite->initWithPolygon(inf);

Conclusion

Creating a custom mesh for a sprite can be accomplished in 3 steps

Create a Sprite

Initialize a a PolygonInfo Structure with your mesh

Call initWithPolygon of your created sprite using your PolygonInfo struct

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OSX Finder Favorites

Browsing folders in Finder can be an annoying and time consuming thing. Working on a project leads to open certain folders more often. Thus it is helpful to speed up navigating to those folders. Simply drag and drop your project folders to the favorites list on left side of Finder window. There you go. Navigating to your project folder is just one click away then.

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Hello World. I am a Knalleridee.

Well, we made it. Welcome to our tiny sweet blog about what might be called work and the residual nonsense happening at Knalleridee! We are Christian and Daniel working for this weird adventure called.. you read it.

What can you expect from this blog?

Absolutely nothing... that’s why you will be surprised. :)