I'm following the tutorial here: http://iphone-3d-programming.labs.oreilly.com/ch01.html#ch01_id36002837
When I try to run the program, I get an error saying "Redefinition of 'void RenderingEngine1::OnRotate(DeviceOrientation)"
Here's the code. The function is at the end of it:
#include <OpenGLES/ES1/gl.h>
#include <OpenGLES/ES1/glext.h>
#include "IRenderingEngine.hpp"
class RenderingEngine1 : public IRenderingEngine {
public:
RenderingEngine1();
void Initialize(int width, int height);
void Render() const;
void UpdateAnimation(float timeStep) {}
void OnRotate(DeviceOrientation orientation) {}
private:
float m_currentAngle;
GLuint m_framebuffer;
GLuint m_renderbuffer;
};
IRenderingEngine* CreateRenderer1()
{
return new RenderingEngine1();
}
struct Vertex {
float Position[2];
float Color[4];
};
// Define the positions and colors of two triangles.
const Vertex Vertices[] = {
{{-0.5, -0.866}, {1, 1, 0.5f, 1}},
{{0.5, -0.866}, {1, 1, 0.5f, 1}},
{{0, 1}, {1, 1, 0.5f, 1}},
{{-0.5, -0.866}, {0.5f, 0.5f, 0.5f}},
{{0.5, -0.866}, {0.5f, 0.5f, 0.5f}},
{{0, -0.4f}, {0.5f, 0.5f, 0.5f}},
};
RenderingEngine1::RenderingEngine1()
{
glGenRenderbuffersOES(1, &m_renderbuffer);
glBindRenderbufferOES(GL_RENDERBUFFER_OES, m_renderbuffer);
}
void RenderingEngine1::Initialize(int width, int height)
{
// Create the framebuffer object and attach the color buffer.
glGenFramebuffersOES(1, &m_framebuffer);
glBindFramebufferOES(GL_FRAMEBUFFER_OES, m_framebuffer);
glFramebufferRenderbufferOES(GL_FRAMEBUFFER_OES,
GL_COLOR_ATTACHMENT0_OES,
GL_RENDERBUFFER_OES,
m_renderbuffer);
glViewport(0, 0, width, height);
glMatrixMode(GL_PROJECTION);
// Initialize the projection matrix.
const float maxX = 2;
const float maxY = 3;
glOrthof(-maxX, +maxX, -maxY, +maxY, -1, 1);
glMatrixMode(GL_MODELVIEW);
}
void RenderingEngine1::Render() const
{
glClearColor(0.5f, 0.5f, 0.5f, 1);
glClear(GL_COLOR_BUFFER_BIT);
glPushMatrix();
glRotatef(m_currentAngle, 0, 0, 1);
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_COLOR_ARRAY);
glVertexPointer(2, GL_FLOAT, sizeof(Vertex), &Vertices[0].Position[0]);
glColorPointer(4, GL_FLOAT, sizeof(Vertex), &Vertices[0].Color[0]);
GLsizei vertexCount = sizeof(Vertices) / sizeof(Vertex);
glDrawArrays(GL_TRIANGLES, 0, vertexCount);
glDisableClientState(GL_VERTEX_ARRAY);
glDisableClientState(GL_COLOR_ARRAY);
glPopMatrix();
}
void RenderingEngine1::OnRotate(DeviceOrientation orientation)
{
float angle = 0;
switch (orientation) {
case DeviceOrientationLandscapeLeft:
angle = 270;
break;
case DeviceOrientationPortraitUpsideDown:
angle = 180;
break;
case DeviceOrientationLandscapeRight:
angle = 90;
break;
}
m_currentAngle开发者_如何学JAVA = angle;
}
remove the body
class RenderingEngine1 : public IRenderingEngine {
public:
...
void OnRotate(DeviceOrientation orientation) {}
...
-> void OnRotate(DeviceOrientation orientation);
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