mirror of https://github.com/axmolengine/axmol.git
Add ccDrawSolidCircle
Similar to ccDrawCircle() primitives drawing function except the circle is filled.
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@ -383,6 +383,52 @@ void CC_DLL ccDrawCircle( const Point& center, float radius, float angle, unsign
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ccDrawCircle(center, radius, angle, segments, drawLineToCenter, 1.0f, 1.0f);
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}
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void ccDrawSolidCircle( const Point& center, float radius, float angle, unsigned int segments, float scaleX, float scaleY)
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{
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lazy_init();
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const float coef = 2.0f * (float)M_PI/segments;
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GLfloat *vertices = (GLfloat*)calloc( sizeof(GLfloat)*2*(segments+2), 1);
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if( ! vertices )
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return;
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for(unsigned int i = 0;i <= segments; i++) {
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float rads = i*coef;
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GLfloat j = radius * cosf(rads + angle) * scaleX + center.x;
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GLfloat k = radius * sinf(rads + angle) * scaleY + center.y;
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vertices[i*2] = j;
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vertices[i*2+1] = k;
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}
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vertices[(segments+1)*2] = center.x;
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vertices[(segments+1)*2+1] = center.y;
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s_pShader->use();
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s_pShader->setUniformsForBuiltins();
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s_pShader->setUniformLocationWith4fv(s_nColorLocation, (GLfloat*) &s_tColor.r, 1);
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ccGLEnableVertexAttribs( kVertexAttribFlag_Position );
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#ifdef EMSCRIPTEN
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setGLBufferData(vertices, sizeof(GLfloat)*2*(segments+2));
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glVertexAttribPointer(kVertexAttrib_Position, 2, GL_FLOAT, GL_FALSE, 0, 0);
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#else
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glVertexAttribPointer(kVertexAttrib_Position, 2, GL_FLOAT, GL_FALSE, 0, vertices);
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#endif // EMSCRIPTEN
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glDrawArrays(GL_TRIANGLE_FAN, 0, (GLsizei) segments+1);
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free( vertices );
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CC_INCREMENT_GL_DRAWS(1);
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}
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void CC_DLL ccDrawSolidCircle( const Point& center, float radius, float angle, unsigned int segments)
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{
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ccDrawSolidCircle(center, radius, angle, segments, 1.0f, 1.0f);
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}
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void ccDrawQuadBezier(const Point& origin, const Point& control, const Point& destination, unsigned int segments)
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{
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lazy_init();
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@ -113,6 +113,10 @@ void CC_DLL ccDrawSolidPoly( const Point *poli, unsigned int numberOfPoints, ccC
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void CC_DLL ccDrawCircle( const Point& center, float radius, float angle, unsigned int segments, bool drawLineToCenter, float scaleX, float scaleY);
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void CC_DLL ccDrawCircle( const Point& center, float radius, float angle, unsigned int segments, bool drawLineToCenter);
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/** draws a solid circle given the center, radius and number of segments. */
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void CC_DLL ccDrawSolidCircle( const Point& center, float radius, float angle, unsigned int segments, float scaleX, float scaleY);
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void CC_DLL ccDrawSolidCircle( const Point& center, float radius, float angle, unsigned int segments);
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/** draws a quad bezier path
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@warning This function could be pretty slow. Use it only for debugging purposes.
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@since v0.8
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@ -172,6 +172,13 @@ void DrawPrimitivesTest::draw()
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CHECK_GL_ERROR_DEBUG();
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// draw a pink solid circle with 50 segments
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glLineWidth(2);
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ccDrawColor4B(255, 0, 255, 255);
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ccDrawSolidCircle( VisibleRect::center() + ccp(140,0), 40, CC_DEGREES_TO_RADIANS(90), 50, 1.0f, 1.0f);
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CHECK_GL_ERROR_DEBUG();
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// open yellow poly
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ccDrawColor4B(255, 255, 0, 255);
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glLineWidth(10);
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