Question

我有一个实体（三角形），当尝试以圆周运动旋转它的旋转时。当我应用投影和变换矩阵时，它也没有居中，它位于离中心一定距离的右边，我什至不知道为什么它没有居中

变换矩阵以及顶点

float[] vertices = {
                1409.598f, -58.85f, 1471.946f,
                1460.572f, -58.9047f, 1462.047f,
                1408.506f, -20.5531f, 1471.137f
        };

public static Matrix4f createTransformationMatrix(Vector3f entity, float rx, float ry,
            float rz, float scale) {
        Matrix4f matrix = new Matrix4f();
        matrix.setIdentity();
        Matrix4f.translate(entity, matrix, matrix);
        Matrix4f.rotate((float) Math.toRadians(rx), new Vector3f(1,0,0), matrix, matrix);
        Matrix4f.rotate((float) Math.toRadians(ry), new Vector3f(0,1,0), matrix, matrix);
        Matrix4f.rotate((float) Math.toRadians(rz), new Vector3f(0,0,1), matrix, matrix);
        Matrix4f.scale(new Vector3f(scale,scale,scale), matrix, matrix);

        return matrix;
    }

有帮助吗？

投影矩阵：

private static final float FOV = 70;
private static final float NEAR_PLANE = 0.1f;
private static final float FAR_PLANE = 10000;

private void createProjectionMatrix() {
        float aspectRatio = (float) Display.getWidth() / (float) Display.getHeight();
        float y_scale = (float) ((1f / Math.tan(Math.toRadians(FOV / 2f))) * aspectRatio);
        float x_scale = y_scale / aspectRatio;
        float frustum_length = FAR_PLANE - NEAR_PLANE;

        projectionMatrix = new Matrix4f();
        projectionMatrix.m00 = x_scale;
        projectionMatrix.m11 = y_scale;
        projectionMatrix.m20 = 0f;
        projectionMatrix.m21 = 0f;
        projectionMatrix.m22 = -((FAR_PLANE + NEAR_PLANE) / frustum_length);
        projectionMatrix.m23 = -1;
        projectionMatrix.m32 = -((2 * NEAR_PLANE * FAR_PLANE) / frustum_length);
        projectionMatrix.m33 = 0;

    }

视图矩阵：

public static Matrix4f createViewMatrix(Camera camera) {
        Matrix4f viewMatrix = new Matrix4f();
        viewMatrix.setIdentity();
        Matrix4f.rotate((float) Math.toRadians(camera.getPitch()), new Vector3f(1, 0, 0), viewMatrix,
                viewMatrix);
        Matrix4f.rotate((float) Math.toRadians(camera.getYaw()), new Vector3f(0, 1, 0), viewMatrix, viewMatrix);
        Vector3f cameraPos = camera.getPosition();

        Vector3f negativeCameraPos = new Vector3f(-cameraPos.x, -cameraPos.y, -cameraPos.z);
        Matrix4f.translate(negativeCameraPos, viewMatrix, viewMatrix);
        return viewMatrix;
    }

顶点着色器：

#version 400 core

in vec3 position;

uniform mat4 transformationMatrix;
uniform mat4 projectionMatrix;
uniform mat4 viewMatrix;

void main(void){

    gl_Position = projectionMatrix * viewMatrix * transformationMatrix * vec4(position,1.0);

}

Answer 1

我认为您的投影矩阵有误。使用此行：

 float y_scale = 1f / Math.tan(Math.toRadians(FOV / 2f));

lwjgl模型不在中心旋转

1 个答案: