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#ifndef COMMON_RENDER_INTERFACE_H
#define COMMON_RENDER_INTERFACE_H
struct CommonCameraInterface;
enum
{
B3_GL_TRIANGLES = 1,
B3_GL_POINTS
};
enum
{
B3_DEFAULT_RENDERMODE=1,
//B3_WIREFRAME_RENDERMODE,
B3_CREATE_SHADOWMAP_RENDERMODE,
B3_USE_SHADOWMAP_RENDERMODE,
};
struct CommonRenderInterface
{
virtual void init()=0;
virtual void updateCamera(int upAxis)=0;
virtual void removeAllInstances() = 0;
virtual const CommonCameraInterface* getActiveCamera() const =0;
virtual CommonCameraInterface* getActiveCamera()=0;
virtual void setActiveCamera(CommonCameraInterface* cam)=0;
virtual void renderScene()=0;
virtual int getScreenWidth() = 0;
virtual int getScreenHeight() = 0;
virtual void resize(int width, int height) = 0;
virtual int registerGraphicsInstance(int shapeIndex, const float* position, const float* quaternion, const float* color, const float* scaling)=0;
virtual int registerGraphicsInstance(int shapeIndex, const double* position, const double* quaternion, const double* color, const double* scaling)=0;
virtual void drawLines(const float* positions, const float color[4], int numPoints, int pointStrideInBytes, const unsigned int* indices, int numIndices, float pointDrawSize)=0;
virtual void drawLine(const float from[4], const float to[4], const float color[4], float lineWidth) = 0;
virtual void drawLine(const double from[4], const double to[4], const double color[4], double lineWidth) = 0;
virtual void drawPoint(const float* position, const float color[4], float pointDrawSize)=0;
virtual void drawPoint(const double* position, const double color[4], double pointDrawSize)=0;
virtual int registerShape(const float* vertices, int numvertices, const int* indices, int numIndices,int primitiveType=B3_GL_TRIANGLES, int textureIndex=-1)=0;
virtual void updateShape(int shapeIndex, const float* vertices)=0;
virtual int registerTexture(const unsigned char* texels, int width, int height)=0;
virtual void writeSingleInstanceTransformToCPU(const float* position, const float* orientation, int srcIndex)=0;
virtual void writeSingleInstanceTransformToCPU(const double* position, const double* orientation, int srcIndex)=0;
virtual void writeSingleInstanceColorToCPU(float* color, int srcIndex)=0;
virtual void writeSingleInstanceColorToCPU(double* color, int srcIndex)=0;
virtual void writeTransforms()=0;
virtual void enableBlend(bool blend)=0;
virtual void clearZBuffer()=0;
//This is internal access to OpenGL3+ features, mainly used for OpenCL-OpenGL interop
//Only the GLInstancingRenderer supports it, just return 0 otherwise.
virtual struct GLInstanceRendererInternalData* getInternalData()=0;
};
template <typename T>
inline int projectWorldCoordToScreen(T objx, T objy, T objz,
const T modelMatrix[16],
const T projMatrix[16],
const int viewport[4],
T *winx, T *winy, T *winz)
{
int i;
T in2[4];
T tmp[4];
in2[0]=objx;
in2[1]=objy;
in2[2]=objz;
in2[3]=T(1.0);
for (i=0; i<4; i++)
{
tmp[i] = in2[0] * modelMatrix[0*4+i] + in2[1] * modelMatrix[1*4+i] +
in2[2] * modelMatrix[2*4+i] + in2[3] * modelMatrix[3*4+i];
}
T out[4];
for (i=0; i<4; i++)
{
out[i] = tmp[0] * projMatrix[0*4+i] + tmp[1] * projMatrix[1*4+i] + tmp[2] * projMatrix[2*4+i] + tmp[3] * projMatrix[3*4+i];
}
if (out[3] == T(0.0))
return 0;
out[0] /= out[3];
out[1] /= out[3];
out[2] /= out[3];
/* Map x, y and z to range 0-1 */
out[0] = out[0] * T(0.5) + T(0.5);
out[1] = out[1] * T(0.5) + T(0.5);
out[2] = out[2] * T(0.5) + T(0.5);
/* Map x,y to viewport */
out[0] = out[0] * viewport[2] + viewport[0];
out[1] = out[1] * viewport[3] + viewport[1];
*winx=out[0];
*winy=out[1];
*winz=out[2];
return 1;
}
#endif//COMMON_RENDER_INTERFACE_H
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