#problem in creating a camera in opengl

5 messages · Page 1 of 1 (latest)

fleet egret
# 
class Camera
{
   public:
    Camera() = default;
    glm::vec3 cameraPos = glm::vec3(0.0f, 0.0f, 0.0f);
    glm::vec3 cameraRot = glm::vec3(0.0f, 0.0f, 0.0f);
    float FOV = 100.0f;
    float zFAR = 100.0f;
    float zNEAR = 0.01f;
    float aspect = 1.0f;
    glm::mat4 projection;
    glm::mat4 view;

    void update()
    {
        glm::vec3 cameraFront;
        cameraFront.x = cos(glm::radians(cameraRot.x)) * cos(glm::radians(cameraRot.y));
        cameraFront.y = sin(glm::radians(cameraRot.x));
        cameraFront.z = cos(glm::radians(cameraRot.x)) * sin(glm::radians(cameraRot.y));
        cameraFront = glm::normalize(cameraFront);

        glm::vec3 worldUp = glm::vec3(0.0f, 1.0f, 0.0f);
        glm::mat4 rollMatrix = glm::rotate(glm::mat4(1.0f), cameraRot.z, cameraFront);
        glm::vec3 cameraUp = glm::normalize(glm::vec3(rollMatrix * glm::vec4(worldUp, 0.0f)));

        projection = glm::perspective(glm::radians(FOV), aspect, zNEAR, zFAR);
        view = glm::lookAt(cameraPos, cameraPos + cameraFront, cameraUp);
    }

    void update(int width, int height)
    {
        aspect = (float)width / (float)height;
        update();
    }

    void cameraMatrix(Shader& shader)
    {
        glm::mat4 camMatrix;

        camMatrix = projection * view;
        shader.bind();
        shader.setMat4("camMat", camMatrix);
        shader.unbind();
    }
};

any problem with this?
why my mesh disapeared when i multilple the gl_position with the camMat

small orchidBOT
#

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fleet egret
# 
#version 330 core

layout(location = 0) in vec3 aPos;     
layout(location = 1) in vec3 aNormal;   
layout(location = 2) in vec3 aColor;
layout(location = 3) in vec2 aTexCoord;

out vec3 color;
uniform mat4 model;
uniform mat4 camMat;

void main(){
    gl_Position = camMat * model * vec4(aPos, 1.0f);
    color = aColor;
}

my vertex shader btw

patent berry
#

I think you should also apply radians to cameraRot.z in the rollMatrix multiplication.dont_know_man

fleet egret