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axmol/cocos/2d/CCDrawNode.cpp

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/* Copyright (c) 2012 Scott Lembcke and Howling Moon Software
* Copyright (c) 2012 cocos2d-x.org
* Copyright (c) 2013-2016 Chukong Technologies Inc.
* Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "2d/CCDrawNode.h"
#include <stddef.h> // offsetof
#include "base/ccTypes.h"
#include "base/CCEventType.h"
#include "base/CCConfiguration.h"
#include "renderer/CCRenderer.h"
#include "base/CCDirector.h"
#include "base/CCEventListenerCustom.h"
#include "base/CCEventDispatcher.h"
#include "2d/CCActionCatmullRom.h"
#include "base/ccUtils.h"
#include "renderer/ccShaders.h"
#include "renderer/backend/ProgramState.h"
NS_CC_BEGIN
static inline Tex2F v2ToTex2F(const Vec2 &v)
{
return {v.x, v.y};
}
// implementation of DrawNode
DrawNode::DrawNode(float lineWidth)
: _lineWidth(lineWidth)
, _defaultLineWidth(lineWidth)
{
_blendFunc = BlendFunc::ALPHA_PREMULTIPLIED;
#if CC_ENABLE_CACHE_TEXTURE_DATA
//TODO new-renderer: interface setupBuffer removal
// Need to listen the event only when not use batchnode, because it will use VBO
// auto listener = EventListenerCustom::create(EVENT_RENDERER_RECREATED, [this](EventCustom* event){
// /** listen the event that renderer was recreated on Android/WP8 */
// this->setupBuffer();
// });
// _eventDispatcher->addEventListenerWithSceneGraphPriority(listener, this);
#endif
}
DrawNode::~DrawNode()
{
free(_buffer);
_buffer = nullptr;
free(_bufferGLPoint);
_bufferGLPoint = nullptr;
free(_bufferGLLine);
_bufferGLLine = nullptr;
CC_SAFE_RELEASE(_programStatePoint);
CC_SAFE_RELEASE(_programStateLine);
}
DrawNode* DrawNode::create(float defaultLineWidth)
{
DrawNode* ret = new (std::nothrow) DrawNode(defaultLineWidth);
if (ret && ret->init())
{
ret->autorelease();
}
else
{
CC_SAFE_DELETE(ret);
}
return ret;
}
void DrawNode::ensureCapacity(int count)
{
CCASSERT(count>=0, "capacity must be >= 0");
if(_bufferCount + count > _bufferCapacity)
{
_bufferCapacity += MAX(_bufferCapacity, count);
_buffer = (V2F_C4B_T2F*)realloc(_buffer, _bufferCapacity*sizeof(V2F_C4B_T2F));
_customCommand.createVertexBuffer(sizeof(V2F_C4B_T2F), _bufferCapacity, CustomCommand::BufferUsage::STATIC);
_customCommand.updateVertexBuffer(_buffer, _bufferCapacity*sizeof(V2F_C4B_T2F));
}
}
void DrawNode::ensureCapacityGLPoint(int count)
{
CCASSERT(count>=0, "capacity must be >= 0");
if(_bufferCountGLPoint + count > _bufferCapacityGLPoint)
{
_bufferCapacityGLPoint += MAX(_bufferCapacityGLPoint, count);
_bufferGLPoint = (V2F_C4B_T2F*)realloc(_bufferGLPoint, _bufferCapacityGLPoint*sizeof(V2F_C4B_T2F));
_customCommandGLPoint.createVertexBuffer(sizeof(V2F_C4B_T2F), _bufferCapacityGLPoint, CustomCommand::BufferUsage::STATIC);
_customCommandGLPoint.updateVertexBuffer(_bufferGLPoint, _bufferCapacityGLPoint*sizeof(V2F_C4B_T2F));
}
}
void DrawNode::ensureCapacityGLLine(int count)
{
CCASSERT(count>=0, "capacity must be >= 0");
if(_bufferCountGLLine + count > _bufferCapacityGLLine)
{
_bufferCapacityGLLine += MAX(_bufferCapacityGLLine, count);
_bufferGLLine = (V2F_C4B_T2F*)realloc(_bufferGLLine, _bufferCapacityGLLine*sizeof(V2F_C4B_T2F));
_customCommandGLLine.createVertexBuffer(sizeof(V2F_C4B_T2F), _bufferCapacityGLLine, CustomCommand::BufferUsage::STATIC);
_customCommandGLLine.updateVertexBuffer(_bufferGLLine, _bufferCapacityGLLine*sizeof(V2F_C4B_T2F));
}
}
bool DrawNode::init()
{
_blendFunc = BlendFunc::ALPHA_PREMULTIPLIED;
updateShader();
ensureCapacity(512);
ensureCapacityGLPoint(64);
ensureCapacityGLLine(256);
_dirty = true;
_dirtyGLLine = true;
_dirtyGLPoint = true;
return true;
}
void DrawNode::updateShader()
{
auto* program = backend::Program::getBuiltinProgram(backend::ProgramType::POSITION_COLOR_LENGTH_TEXTURE);
setProgramState(new (std::nothrow) backend::ProgramState(program));
_customCommand.getPipelineDescriptor().programState = _programState;
setVertexLayout(_customCommand);
_customCommand.setDrawType(CustomCommand::DrawType::ARRAY);
_customCommand.setPrimitiveType(CustomCommand::PrimitiveType::TRIANGLE);
CC_SAFE_RELEASE(_programStatePoint);
program = backend::Program::getBuiltinProgram(backend::ProgramType::POSITION_COLOR_TEXTURE_AS_POINTSIZE);
_programStatePoint = new (std::nothrow) backend::ProgramState(program);
_customCommandGLPoint.getPipelineDescriptor().programState = _programStatePoint;
setVertexLayout(_customCommandGLPoint);
_customCommandGLPoint.setDrawType(CustomCommand::DrawType::ARRAY);
_customCommandGLPoint.setPrimitiveType(CustomCommand::PrimitiveType::POINT);
CC_SAFE_RELEASE(_programStateLine);
program = backend::Program::getBuiltinProgram(backend::ProgramType::POSITION_COLOR_LENGTH_TEXTURE);
_programStateLine = new (std::nothrow) backend::ProgramState(program);
_customCommandGLLine.getPipelineDescriptor().programState = _programStateLine;
setVertexLayout(_customCommandGLLine);
_customCommandGLLine.setDrawType(CustomCommand::DrawType::ARRAY);
_customCommandGLLine.setPrimitiveType(CustomCommand::PrimitiveType::LINE);
}
void DrawNode::setVertexLayout(CustomCommand& cmd)
{
auto* programState = cmd.getPipelineDescriptor().programState;
auto layout = programState->getVertexLayout();
const auto& attributeInfo = programState->getProgram()->getActiveAttributes();
auto iter = attributeInfo.find("a_position");
if(iter != attributeInfo.end())
{
layout->setAttribute("a_position", iter->second.location, backend::VertexFormat::FLOAT2, 0, false);
}
iter = attributeInfo.find("a_texCoord");
if(iter != attributeInfo.end())
{
layout->setAttribute("a_texCoord", iter->second.location, backend::VertexFormat::FLOAT2, offsetof(V2F_C4B_T2F, texCoords), false);
}
iter = attributeInfo.find("a_color");
if(iter != attributeInfo.end())
{
layout->setAttribute("a_color", iter->second.location, backend::VertexFormat::UBYTE4, offsetof(V2F_C4B_T2F, colors), true);
}
layout->setLayout(sizeof(V2F_C4B_T2F));
}
void DrawNode::updateBlendState(CustomCommand& cmd)
{
backend::BlendDescriptor& blendDescriptor = cmd.getPipelineDescriptor().blendDescriptor;
blendDescriptor.blendEnabled = true;
if (_blendFunc == BlendFunc::ALPHA_NON_PREMULTIPLIED)
{
blendDescriptor.sourceRGBBlendFactor = backend::BlendFactor::SRC_ALPHA;
blendDescriptor.destinationRGBBlendFactor = backend::BlendFactor::ONE_MINUS_SRC_ALPHA;
blendDescriptor.sourceAlphaBlendFactor = backend::BlendFactor::SRC_ALPHA;
blendDescriptor.destinationAlphaBlendFactor = backend::BlendFactor::ONE_MINUS_SRC_ALPHA;
setOpacityModifyRGB(false);
}
else
{
blendDescriptor.sourceRGBBlendFactor = backend::BlendFactor::ONE;
blendDescriptor.destinationRGBBlendFactor = backend::BlendFactor::ONE_MINUS_SRC_ALPHA;
blendDescriptor.sourceAlphaBlendFactor = backend::BlendFactor::ONE;
blendDescriptor.destinationAlphaBlendFactor = backend::BlendFactor::ONE_MINUS_SRC_ALPHA;
setOpacityModifyRGB(true);
}
}
void DrawNode::updateUniforms(const Mat4 &transform, CustomCommand& cmd)
{
auto& pipelineDescriptor = cmd.getPipelineDescriptor();
const auto& matrixP = _director->getMatrix(MATRIX_STACK_TYPE::MATRIX_STACK_PROJECTION);
Mat4 matrixMVP = matrixP * transform;
auto mvpLocation = pipelineDescriptor.programState->getUniformLocation("u_MVPMatrix");
pipelineDescriptor.programState->setUniform(mvpLocation, matrixMVP.m, sizeof(matrixMVP.m));
float alpha = _displayedOpacity / 255.0f;
auto alphaUniformLocation = pipelineDescriptor.programState->getUniformLocation("u_alpha");
pipelineDescriptor.programState->setUniform(alphaUniformLocation, &alpha, sizeof(alpha));
}
void DrawNode::draw(Renderer *renderer, const Mat4 &transform, uint32_t flags)
{
if(_bufferCount)
{
updateBlendState(_customCommand);
updateUniforms(transform, _customCommand);
_customCommand.init(_globalZOrder);
renderer->addCommand(&_customCommand);
}
if(_bufferCountGLPoint)
{
updateBlendState(_customCommandGLPoint);
updateUniforms(transform, _customCommandGLPoint);
_customCommandGLPoint.init(_globalZOrder);
renderer->addCommand(&_customCommandGLPoint);
}
if(_bufferCountGLLine)
{
updateBlendState(_customCommandGLLine);
updateUniforms(transform, _customCommandGLLine);
_customCommandGLLine.setLineWidth(_lineWidth);
_customCommandGLLine.init(_globalZOrder);
renderer->addCommand(&_customCommandGLLine);
}
}
void DrawNode::drawPoint(const Vec2& position, const float pointSize, const Color4F &color)
{
ensureCapacityGLPoint(1);
V2F_C4B_T2F *point = _bufferGLPoint + _bufferCountGLPoint;
*point = {position, Color4B(color), Tex2F(pointSize,0)};
_customCommandGLPoint.updateVertexBuffer(point, _bufferCountGLPoint*sizeof(V2F_C4B_T2F), sizeof(V2F_C4B_T2F));
_bufferCountGLPoint += 1;
_dirtyGLPoint = true;
_customCommandGLPoint.setVertexDrawInfo(0, _bufferCountGLPoint);
}
void DrawNode::drawPoints(const Vec2 *position, unsigned int numberOfPoints, const Color4F &color)
{
drawPoints(position, numberOfPoints, 1.0, color);
}
void DrawNode::drawPoints(const Vec2 *position, unsigned int numberOfPoints, const float pointSize, const Color4F &color)
{
ensureCapacityGLPoint(numberOfPoints);
V2F_C4B_T2F *point = _bufferGLPoint + _bufferCountGLPoint;
for(unsigned int i=0; i < numberOfPoints; i++)
{
*(point + i) = {position[i], Color4B(color), Tex2F(pointSize,0)};
}
_customCommandGLPoint.updateVertexBuffer(point, _bufferCountGLPoint*sizeof(V2F_C4B_T2F), numberOfPoints*sizeof(V2F_C4B_T2F));
_bufferCountGLPoint += numberOfPoints;
_dirtyGLPoint = true;
_customCommandGLPoint.setVertexDrawInfo(0, _bufferCountGLPoint);
}
void DrawNode::drawLine(const Vec2 &origin, const Vec2 &destination, const Color4F &color)
{
ensureCapacityGLLine(2);
V2F_C4B_T2F *point = _bufferGLLine + _bufferCountGLLine;
*point = {origin, Color4B(color), Tex2F(0.0, 0.0)};
*(point+1) = {destination, Color4B(color), Tex2F(0.0, 0.0)};
_customCommandGLLine.updateVertexBuffer(point, _bufferCountGLLine*sizeof(V2F_C4B_T2F), 2*sizeof(V2F_C4B_T2F));
_bufferCountGLLine += 2;
_dirtyGLLine = true;
_customCommandGLLine.setVertexDrawInfo(0, _bufferCountGLLine);
}
void DrawNode::drawRect(const Vec2 &origin, const Vec2 &destination, const Color4F &color)
{
drawLine(origin, Vec2(destination.x, origin.y), color);
drawLine(Vec2(destination.x, origin.y), destination, color);
drawLine(destination, Vec2(origin.x, destination.y), color);
drawLine(Vec2(origin.x, destination.y), origin, color);
}
void DrawNode::drawPoly(const Vec2 *poli, unsigned int numberOfPoints, bool closePolygon, const Color4F &color)
{
unsigned int vertex_count;
if(closePolygon)
{
vertex_count = 2 * numberOfPoints;
ensureCapacityGLLine(vertex_count);
}
else
{
vertex_count = 2 * (numberOfPoints - 1);
ensureCapacityGLLine(vertex_count);
}
V2F_C4B_T2F *point = _bufferGLLine + _bufferCountGLLine;
V2F_C4B_T2F *cursor = point;
unsigned int i = 0;
for(; i < numberOfPoints - 1; i++)
{
*point = {poli[i], Color4B(color), Tex2F(0.0, 0.0)};
*(point + 1) = {poli[i+1], Color4B(color), Tex2F(0.0, 0.0)};
point += 2;
}
if(closePolygon)
{
*point = {poli[i], Color4B(color), Tex2F(0.0, 0.0)};
*(point + 1) = {poli[0], Color4B(color), Tex2F(0.0, 0.0)};
}
_customCommandGLLine.updateVertexBuffer(cursor, _bufferCountGLLine*sizeof(V2F_C4B_T2F), vertex_count*sizeof(V2F_C4B_T2F));
_bufferCountGLLine += vertex_count;
_customCommandGLLine.setVertexDrawInfo(0, _bufferCountGLLine);
}
void DrawNode::drawCircle(const Vec2& center, float radius, float angle, unsigned int segments, bool drawLineToCenter, float scaleX, float scaleY, const Color4F &color)
{
const float coef = 2.0f * (float)M_PI/segments;
Vec2 *vertices = new (std::nothrow) Vec2[segments+2];
if( ! vertices )
return;
for(unsigned int i = 0;i <= segments; i++) {
float rads = i*coef;
float j = radius * cosf(rads + angle) * scaleX + center.x;
float k = radius * sinf(rads + angle) * scaleY + center.y;
vertices[i].x = j;
vertices[i].y = k;
}
if(drawLineToCenter)
{
vertices[segments+1].x = center.x;
vertices[segments+1].y = center.y;
drawPoly(vertices, segments+2, true, color);
}
else
drawPoly(vertices, segments+1, true, color);
CC_SAFE_DELETE_ARRAY(vertices);
}
void DrawNode::drawCircle(const Vec2 &center, float radius, float angle, unsigned int segments, bool drawLineToCenter, const Color4F &color)
{
drawCircle(center, radius, angle, segments, drawLineToCenter, 1.0f, 1.0f, color);
}
void DrawNode::drawQuadBezier(const Vec2 &origin, const Vec2 &control, const Vec2 &destination, unsigned int segments, const Color4F &color)
{
Vec2* vertices = new (std::nothrow) Vec2[segments + 1];
if( ! vertices )
return;
float t = 0.0f;
for(unsigned int i = 0; i < segments; i++)
{
vertices[i].x = powf(1 - t, 2) * origin.x + 2.0f * (1 - t) * t * control.x + t * t * destination.x;
vertices[i].y = powf(1 - t, 2) * origin.y + 2.0f * (1 - t) * t * control.y + t * t * destination.y;
t += 1.0f / segments;
}
vertices[segments].x = destination.x;
vertices[segments].y = destination.y;
drawPoly(vertices, segments+1, false, color);
CC_SAFE_DELETE_ARRAY(vertices);
}
void DrawNode::drawCubicBezier(const Vec2 &origin, const Vec2 &control1, const Vec2 &control2, const Vec2 &destination, unsigned int segments, const Color4F &color)
{
Vec2* vertices = new (std::nothrow) Vec2[segments + 1];
if( ! vertices )
return;
float t = 0;
for (unsigned int i = 0; i < segments; i++)
{
vertices[i].x = powf(1 - t, 3) * origin.x + 3.0f * powf(1 - t, 2) * t * control1.x + 3.0f * (1 - t) * t * t * control2.x + t * t * t * destination.x;
vertices[i].y = powf(1 - t, 3) * origin.y + 3.0f * powf(1 - t, 2) * t * control1.y + 3.0f * (1 - t) * t * t * control2.y + t * t * t * destination.y;
t += 1.0f / segments;
}
vertices[segments].x = destination.x;
vertices[segments].y = destination.y;
drawPoly(vertices, segments+1, false, color);
CC_SAFE_DELETE_ARRAY(vertices);
}
void DrawNode::drawCardinalSpline(PointArray *config, float tension, unsigned int segments, const Color4F &color)
{
Vec2* vertices = new (std::nothrow) Vec2[segments + 1];
if( ! vertices )
return;
ssize_t p;
float lt;
float deltaT = 1.0f / config->count();
for( unsigned int i=0; i < segments+1;i++) {
float dt = (float)i / segments;
// border
if( dt == 1 ) {
p = config->count() - 1;
lt = 1;
} else {
p = static_cast<ssize_t>(dt / deltaT);
lt = (dt - deltaT * (float)p) / deltaT;
}
// Interpolate
Vec2 pp0 = config->getControlPointAtIndex(p-1);
Vec2 pp1 = config->getControlPointAtIndex(p+0);
Vec2 pp2 = config->getControlPointAtIndex(p+1);
Vec2 pp3 = config->getControlPointAtIndex(p+2);
Vec2 newPos = ccCardinalSplineAt( pp0, pp1, pp2, pp3, tension, lt);
vertices[i].x = newPos.x;
vertices[i].y = newPos.y;
}
drawPoly(vertices, segments+1, false, color);
CC_SAFE_DELETE_ARRAY(vertices);
}
void DrawNode::drawCatmullRom(PointArray *points, unsigned int segments, const Color4F &color)
{
drawCardinalSpline( points, 0.5f, segments, color);
}
void DrawNode::drawDot(const Vec2 &pos, float radius, const Color4F &color)
{
unsigned int vertex_count = 2*3;
ensureCapacity(vertex_count);
V2F_C4B_T2F a = {Vec2(pos.x - radius, pos.y - radius), Color4B(color), Tex2F(-1.0, -1.0) };
V2F_C4B_T2F b = {Vec2(pos.x - radius, pos.y + radius), Color4B(color), Tex2F(-1.0, 1.0) };
V2F_C4B_T2F c = {Vec2(pos.x + radius, pos.y + radius), Color4B(color), Tex2F( 1.0, 1.0) };
V2F_C4B_T2F d = {Vec2(pos.x + radius, pos.y - radius), Color4B(color), Tex2F( 1.0, -1.0) };
V2F_C4B_T2F_Triangle *triangles = (V2F_C4B_T2F_Triangle *)(_buffer + _bufferCount);
V2F_C4B_T2F_Triangle triangle0 = {a, b, c};
V2F_C4B_T2F_Triangle triangle1 = {a, c, d};
triangles[0] = triangle0;
triangles[1] = triangle1;
_customCommand.updateVertexBuffer(triangles, _bufferCount*sizeof(V2F_C4B_T2F), vertex_count*sizeof(V2F_C4B_T2F));
_bufferCount += vertex_count;
_dirty = true;
_customCommand.setVertexDrawInfo(0, _bufferCount);
}
void DrawNode::drawRect(const Vec2 &p1, const Vec2 &p2, const Vec2 &p3, const Vec2& p4, const Color4F &color)
{
drawLine(p1, p2, color);
drawLine(p2, p3, color);
drawLine(p3, p4, color);
drawLine(p4, p1, color);
}
void DrawNode::drawSegment(const Vec2 &from, const Vec2 &to, float radius, const Color4F &color)
{
unsigned int vertex_count = 6*3;
ensureCapacity(vertex_count);
Vec2 a = from;
Vec2 b = to;
Vec2 n = ((b - a).getPerp()).getNormalized();
Vec2 t = n.getPerp();
Vec2 nw = n * radius;
Vec2 tw = t * radius;
Vec2 v0 = b - (nw + tw);
Vec2 v1 = b + (nw - tw);
Vec2 v2 = b - nw;
Vec2 v3 = b + nw;
Vec2 v4 = a - nw;
Vec2 v5 = a + nw;
Vec2 v6 = a - (nw - tw);
Vec2 v7 = a + (nw + tw);
V2F_C4B_T2F_Triangle *triangles = (V2F_C4B_T2F_Triangle *)(_buffer + _bufferCount);
V2F_C4B_T2F_Triangle triangles0 = {
{v0, Color4B(color), v2ToTex2F(-(n + t))},
{v1, Color4B(color), v2ToTex2F(n - t)},
{v2, Color4B(color), v2ToTex2F(-n)},
};
triangles[0] = triangles0;
V2F_C4B_T2F_Triangle triangles1 = {
{v3, Color4B(color), v2ToTex2F(n)},
{v1, Color4B(color), v2ToTex2F(n - t)},
{v2, Color4B(color), v2ToTex2F(-n)},
};
triangles[1] = triangles1;
V2F_C4B_T2F_Triangle triangles2 = {
{v3, Color4B(color), v2ToTex2F(n)},
{v4, Color4B(color), v2ToTex2F(-n)},
{v2, Color4B(color), v2ToTex2F(-n)},
};
triangles[2] = triangles2;
V2F_C4B_T2F_Triangle triangles3 = {
{v3, Color4B(color), v2ToTex2F(n)},
{v4, Color4B(color), v2ToTex2F(-n)},
{v5, Color4B(color), v2ToTex2F(n) },
};
triangles[3] = triangles3;
V2F_C4B_T2F_Triangle triangles4 = {
{v6, Color4B(color), v2ToTex2F(t - n)},
{v4, Color4B(color), v2ToTex2F(-n) },
{v5, Color4B(color), v2ToTex2F(n)},
};
triangles[4] = triangles4;
V2F_C4B_T2F_Triangle triangles5 = {
{v6, Color4B(color), v2ToTex2F(t - n)},
{v7, Color4B(color), v2ToTex2F(t + n)},
{v5, Color4B(color), v2ToTex2F(n)},
};
triangles[5] = triangles5;
_customCommand.updateVertexBuffer(triangles, _bufferCount*sizeof(V2F_C4B_T2F), vertex_count*sizeof(V2F_C4B_T2F));
_bufferCount += vertex_count;
_dirty = true;
_customCommand.setVertexDrawInfo(0, _bufferCount);
}
void DrawNode::drawPolygon(const Vec2 *verts, int count, const Color4F &fillColor, float borderWidth, const Color4F &borderColor)
{
CCASSERT(count >= 0, "invalid count value");
bool outline = (borderColor.a > 0.0f && borderWidth > 0.0f);
auto triangle_count = outline ? (3*count - 2) : (count - 2);
auto vertex_count = 3*triangle_count;
ensureCapacity(vertex_count);
V2F_C4B_T2F_Triangle *triangles = (V2F_C4B_T2F_Triangle *)(_buffer + _bufferCount);
V2F_C4B_T2F_Triangle *cursor = triangles;
for (int i = 0; i < count-2; i++)
{
V2F_C4B_T2F_Triangle tmp = {
{verts[0], Color4B(fillColor), v2ToTex2F(Vec2::ZERO)},
{verts[i+1], Color4B(fillColor), v2ToTex2F(Vec2::ZERO)},
{verts[i+2], Color4B(fillColor), v2ToTex2F(Vec2::ZERO)},
};
*cursor++ = tmp;
}
if(outline)
{
struct ExtrudeVerts {Vec2 offset, n;};
struct ExtrudeVerts* extrude = (struct ExtrudeVerts*)malloc(sizeof(struct ExtrudeVerts) * count);
for (int i = 0; i < count; i++)
{
Vec2 v0 = verts[(i-1+count)%count];
Vec2 v1 = verts[i];
Vec2 v2 = verts[(i+1)%count];
Vec2 n1 = ((v1 - v0).getPerp()).getNormalized();
Vec2 n2 = ((v2 - v1).getPerp()).getNormalized();
Vec2 offset = (n1 + n2) * (1.0f / (Vec2::dot(n1, n2) + 1.0f));
extrude[i] = {offset, n2};
}
for(int i = 0; i < count; i++)
{
int j = (i+1)%count;
Vec2 v0 = verts[i];
Vec2 v1 = verts[j];
Vec2 n0 = extrude[i].n;
Vec2 offset0 = extrude[i].offset;
Vec2 offset1 = extrude[j].offset;
Vec2 inner0 = v0 - offset0 * borderWidth;
Vec2 inner1 = v1 - offset1 * borderWidth;
Vec2 outer0 = v0 + offset0 * borderWidth;
Vec2 outer1 = v1 + offset1 * borderWidth;
V2F_C4B_T2F_Triangle tmp1 = {
{inner0, Color4B(borderColor), v2ToTex2F(-n0)},
{inner1, Color4B(borderColor), v2ToTex2F(-n0)},
{outer1, Color4B(borderColor), v2ToTex2F(n0)}
};
*cursor++ = tmp1;
V2F_C4B_T2F_Triangle tmp2 = {
{inner0, Color4B(borderColor), v2ToTex2F(-n0)},
{outer0, Color4B(borderColor), v2ToTex2F(n0)},
{outer1, Color4B(borderColor), v2ToTex2F(n0)}
};
*cursor++ = tmp2;
}
free(extrude);
}
_customCommand.updateVertexBuffer(triangles, _bufferCount*sizeof(V2F_C4B_T2F), vertex_count*sizeof(V2F_C4B_T2F));
_bufferCount += vertex_count;
_customCommand.setVertexDrawInfo(0, _bufferCount);
_dirty = true;
}
void DrawNode::drawSolidRect(const Vec2 &origin, const Vec2 &destination, const Color4F &color)
{
Vec2 vertices[] = {
origin,
Vec2(destination.x, origin.y),
destination,
Vec2(origin.x, destination.y)
};
drawSolidPoly(vertices, 4, color);
}
void DrawNode::drawSolidPoly(const Vec2 *poli, unsigned int numberOfPoints, const Color4F &color)
{
drawPolygon(poli, numberOfPoints, color, 0.0, Color4F());
}
void DrawNode::drawSolidCircle(const Vec2& center, float radius, float angle, unsigned int segments, float scaleX, float scaleY, const Color4F &color)
{
const float coef = 2.0f * (float)M_PI/segments;
Vec2 *vertices = new (std::nothrow) Vec2[segments];
if( ! vertices )
return;
for(unsigned int i = 0;i < segments; i++)
{
float rads = i*coef;
float j = radius * cosf(rads + angle) * scaleX + center.x;
float k = radius * sinf(rads + angle) * scaleY + center.y;
vertices[i].x = j;
vertices[i].y = k;
}
drawSolidPoly(vertices, segments, color);
CC_SAFE_DELETE_ARRAY(vertices);
}
void DrawNode::drawSolidCircle( const Vec2& center, float radius, float angle, unsigned int segments, const Color4F& color)
{
drawSolidCircle(center, radius, angle, segments, 1.0f, 1.0f, color);
}
void DrawNode::drawTriangle(const Vec2 &p1, const Vec2 &p2, const Vec2 &p3, const Color4F &color)
{
unsigned int vertex_count = 3;
ensureCapacity(vertex_count);
Color4B col = Color4B(color);
V2F_C4B_T2F a = {p1, col, Tex2F(0.0, 0.0) };
V2F_C4B_T2F b = {p2, col, Tex2F(0.0, 0.0) };
V2F_C4B_T2F c = {p3, col, Tex2F(0.0, 0.0) };
V2F_C4B_T2F_Triangle *triangles = (V2F_C4B_T2F_Triangle *)(_buffer + _bufferCount);
V2F_C4B_T2F_Triangle triangle = {a, b, c};
triangles[0] = triangle;
_customCommand.updateVertexBuffer(triangles, _bufferCount*sizeof(V2F_C4B_T2F), vertex_count*sizeof(V2F_C4B_T2F));
_bufferCount += vertex_count;
_dirty = true;
_customCommand.setVertexDrawInfo(0, _bufferCount);
}
void DrawNode::clear()
{
_bufferCount = 0;
_dirty = true;
_bufferCountGLLine = 0;
_dirtyGLLine = true;
_bufferCountGLPoint = 0;
_dirtyGLPoint = true;
_lineWidth = _defaultLineWidth;
}
const BlendFunc& DrawNode::getBlendFunc() const
{
return _blendFunc;
}
void DrawNode::setBlendFunc(const BlendFunc &blendFunc)
{
_blendFunc = blendFunc;
}
void DrawNode::setLineWidth(float lineWidth)
{
_lineWidth = lineWidth;
}
float DrawNode::getLineWidth()
{
return this->_lineWidth;
}
void DrawNode::visit(Renderer* renderer, const Mat4 &parentTransform, uint32_t parentFlags)
{
if (_isolated)
{
//ignore `parentTransform` from parent
Node::visit(renderer, Mat4::IDENTITY, parentFlags);
}
else
{
Node::visit(renderer, parentTransform, parentFlags);
}
}
NS_CC_END
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