axmol/tests/cpp-tests/Classes/Box2DTestBed/CCPhysicsDebugNodeBox2D.cpp

/*
 * Copyright (c) 2021 @aismann; Peter Eismann, Germany; dreifrankensoft
 * 
 * 
 *
 * This software is provided 'as-is', without any express or implied
 * warranty.  In no event will the authors be held liable for any damages
 * arising from the use of this software.
 * Permission is granted to anyone to use this software for any purpose,
 * including commercial applications, and to alter it and redistribute it
 * freely, subject to the following restrictions:
 * 1. The origin of this software must not be misrepresented; you must not
 * claim that you wrote the original software. If you use this software
 * in a product, an acknowledgment in the product documentation would be
 * appreciated but is not required.
 * 2. Altered source versions must be plainly marked as such, and must not be
 * misrepresented as being the original software.
 * 3. This notice may not be removed or altered from any source distribution.
 */

#include "CCPhysicsDebugNodeBox2D.h"
#include "cocos2d.h"
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include "extensions/cocos-ext.h"

USING_NS_CC;

cocos2d::DrawNode* drawBox2D;

//
//// halx99: since adxe init scene default camera at 'initWithXXX' function, only change design size at scene
//// construct is ok see also: https://github.com/adxeproject/adxe/commit/581a7921554c09746616759d5a5ca6ce9d3eaa22
//auto director = Director::getInstance();
//auto glview = director->getOpenGLView();
//Size designSize(960 * 0.85, 640 * 0.85);
//glview->setDesignResolutionSize(designSize.width, designSize.height, ResolutionPolicy::NO_BORDER);
cocos2d::Vec2 physicsDebugNodeOffset = { 260, 70 };

GLESDebugDraw::GLESDebugDraw()
    : mRatio( 10.0f )
{
    this->initShader();
    drawBP = DrawNode::create();
    drawBox2D = drawBP;
    
}

GLESDebugDraw::GLESDebugDraw(float ratio )
    : mRatio( ratio )
{
    this->initShader();
}

void GLESDebugDraw::initShader( void )
{
    //mShaderProgram = GLProgramCache::getInstance()->getGLProgram(GLProgram::SHADER_NAME_POSITION_U_COLOR);
    //mColorLocation = glGetUniformLocation( mShaderProgram->getProgram(), "u_color");
}

void GLESDebugDraw::DrawPolygon(const b2Vec2* verts, int vertexCount, const b2Color& color)
{
    if (!drawBP) return;

    Vec2* vec = new (std::nothrow) Vec2[vertexCount];
    for (size_t i = 0; i < vertexCount; i++) {
        vec[i] = Vec2(verts[i].x * mRatio, verts[i].y * mRatio) + physicsDebugNodeOffset;
    }
    drawBP->drawPolygon(vec, vertexCount, Color4F(color.r, color.g, color.b, color.a), 1, Color4F(color.r, color.g, color.b, color.a));
}

void GLESDebugDraw::DrawSolidPolygon(const b2Vec2* verts, int vertexCount, const b2Color& color)
{
    if (!drawBP) return; 

    Vec2* vec = new (std::nothrow) Vec2[vertexCount];
    for (size_t i = 0; i < vertexCount; i++) {
        vec[i] = Vec2(verts[i].x * mRatio, verts[i].y * mRatio) + physicsDebugNodeOffset;
    }
    drawBP->drawPolygon(vec, vertexCount, Color4F(color.r / 2, color.g / 2, color.b / 2, color.a), 0.2f, Color4F(color.r, color.g, color.b, color.a));
    //drawBP->drawSolidPoly(vec, vertexCount, Color4F(color.r, color.g, color.b, color.a));
}

void GLESDebugDraw::DrawCircle(const b2Vec2& center, float radius, const b2Color& color)
{
    if (!drawBP) return;

    drawBP->drawCircle(Vec2(center.x * mRatio, center.y * mRatio) + physicsDebugNodeOffset, radius* mRatio, CC_DEGREES_TO_RADIANS(0), 30, true, 1.0f,
        1.0f, Color4F(color.r, color.g, color.b, color.a));
}

void GLESDebugDraw::DrawSolidCircle(const b2Vec2& center, float radius, const b2Vec2& axis, const b2Color& color)
{
    if (!drawBP) return;

    // DrawSolidCircle Maybe have to fix later
    drawBP->drawCircle(Vec2(center.x * mRatio, center.y * mRatio) + physicsDebugNodeOffset, radius* mRatio, CC_DEGREES_TO_RADIANS(0), 20, true, 1.0f, 1.0f, Color4F(color.r, color.g, color.b, color.a));
}

void GLESDebugDraw::DrawSegment(const b2Vec2& p1, const b2Vec2& p2, const b2Color& color)
{
   if (!drawBP) return;

    drawBP->drawLine(Vec2(p1.x * mRatio, p1.y * mRatio) + physicsDebugNodeOffset, Vec2(p2.x * mRatio, p2.y * mRatio) + physicsDebugNodeOffset, Color4F(color.r, color.g, color.b, color.a));
}

void GLESDebugDraw::DrawTransform(const b2Transform& xf)
{
    CCLOG("======== DrawTransform ===========");

    b2Vec2 p1 = xf.p, p2;
    const float k_axisScale = 0.4f;
    p2 = p1 + k_axisScale * xf.q.GetXAxis();
    DrawSegment(p1, p2, b2Color(1,0,0));

    p2 = p1 + k_axisScale * xf.q.GetYAxis();
    DrawSegment(p1,p2,b2Color(0,1,0));
}

void GLESDebugDraw::DrawPoint(const b2Vec2& p, float size, const b2Color& color)
{
    if (!drawBP) return;

    drawBP->drawPoint(Vec2(p.x * mRatio, p.y * mRatio) + physicsDebugNodeOffset, size, Color4F(color.r, color.g, color.b, color.a));
}

void GLESDebugDraw::DrawString(int x, int y, const char *string, ...)
{
//    NSLog(@"DrawString: unsupported: %s", string);
    //printf(string);
    /* Unsupported as yet. Could replace with bitmap font renderer at a later date */
}

void GLESDebugDraw::DrawAABB(b2AABB* aabb, const b2Color& color)
{
    CCLOG("======== DrawAABB ===========");
    if (!drawBP) return;

    b2Vec2 p1 = aabb->lowerBound;
    b2Vec2 p2 = b2Vec2(aabb->upperBound.x, aabb->lowerBound.y);
    b2Vec2 p3 = aabb->upperBound;
    b2Vec2 p4 = b2Vec2(aabb->lowerBound.x, aabb->upperBound.y);

    Vec2 verts[] = {
    Vec2(p1.x * mRatio, p1.y * mRatio) + physicsDebugNodeOffset ,
    Vec2(p2.x * mRatio, p2.y * mRatio) + physicsDebugNodeOffset ,
    Vec2(p3.x * mRatio, p3.y * mRatio) + physicsDebugNodeOffset ,
    Vec2(p4.x * mRatio, p4.y * mRatio) + physicsDebugNodeOffset ,
    };
    drawBP->drawSolidPoly(verts, sizeof(verts) / sizeof(verts[0]), Color4F(color.r, color.g, color.b, color.a));
}